It had been far too long since Chelse had been able to see Cath outside of school. Three months had come and gone, and a screen full of text had been nearly her own form of communication and release with her girlfriend. To be fair, it had been her fault...her new bed had a thick mattress protector which broke in surprisingly quickly. Though she'd hated it at first, it had grown quieter after a few weeks. Her old mattress she'd insisted on keeping, tucking it under the frame of her bed. Her parents had made the simple demand that, after she pay for the new mattress, she not be a bother. No stains around the house, no smells, no being overheard by her siblings or breaking things that weren't hers. It all sounded fair enough, though just to be safe she'd avoided nearly all kinky activity for the last three months, making her grounding only that much worse. Now, in addition to missing her girlfriend terribly, she was also deprived of both orgasm and kink.

Chelse's heart was beating in her throat. Sometimes, it seemed, the stars would align, and the impossible would become possible. There would be no ruining this, nothing to stifle the hormones already building up within her. She felt jittery, a bit nauseous even, her adrenaline running so high she began shivering if she ruminated too long. When the doorbell finally rang, she let out a yelp, leaping up in her seat and practically sprinting to the door, leaning forward enough to nearly topple herself against it as she reached for the handle. The little mouse was a total mess. And yet, the moment she opened the door, saw the lovely red fur and supple, yet muscular form of the beautiful vixen that she knew was all hers, those golden hazel eyes gleaming at her with admiration and just a hint of lust, her panicked form collapsed, melting into Cath's loving arms.

The fox stood before the doorway in a pair of short denim cutoffs and a cropped white poncho which came only just above her elbows and barely covered her chest, with a black heart made from two bird skulls printed just above her left breast. The upper garment swayed gently in the breeze, revealing a string bikini top printed with the stripes of the lesbian pride flag beneath. Her shorts clung in a pleasing teardrop shape to her form. They bore no buttons or zippers; instead , she simply slid them on, the back sporting a steep V-shaped cutout for her tail. In lieu of a tail loop, the shorts sat high on her hips, cinched at her waist by a leather belt. Her boots shined of patent leather, resting on cloven hooves that kept her feet raised as if on heels, adding several inches to her figure. A small duffel bag lay beside her, containing everything she'd need for her stay. When the door opened, she beamed, her teeth gleaming in contrast against her naturally dark lips accented with a slightly shimmery lipstick. Almost instantly though, she gasped, bending down to catch the mouse tumbling out the door into her arms.

Chelse was dressed as if she were much younger than Cath, sporting a pastel shirt printed with a cartoon frog--a favorite of the mouse's for reasons only she and Cath knew--and a much more conventional pair of cuffed shorts. She was completely barefoot, and the fox scooped her up by her underarms to prevent her both from falling and stepping into the scorching sun-baked pavement just beyond the slim shade of the porch awning. The two giggled as their eyes met. With the boots on, Cath stood nearly a head taller than the mouse, but here in her arms, the two were face-to-face.

"Were you trying to tackle me? Because it looked more like you were just diving for the pavement there," the fox teased, her voice like silk. The mouse blushed, still giggling as she wrapped her legs around Cath's waist.

"I'm just so excited to see you," she remarked, "this is gonna be so perfect! I can't believe everything lined up so well! My parents just left--"

"--this morning, you told me earlier, silly! Let's get inside first. Jeez, you don't want the neighbors to hear," Cath set Chelse back down, spanking her gently, playfully, as the mouse picked up her girlfriend's bag and brought it inside. It was the middle of summer, and as of a few hours ago, Chelse's younger siblings would all be away at summer camp for the next month.

Chelse scurried up the stairs to her room with Cath's bag, baiting the fox into giving chase. After unzipping her boots, she did just that; no doubt her stopping to take off her shoes had tricked the mouse into disappointedly believing she had not been followed, and she was all the more surprised when she saw a red blur, followed by her room rotating before her eyes. The two landed on her bed, the door closing softly as it had been dislodged from the doorstop. Immediately, the two began kissing one another passionately, gently stroking their partner's fur and cuddling up on top of the comforter. Loving strokes and admiration of their velvety fur coats turned slowly into explorative slips beneath clothing as the two continued kissing, playfully swapping tongues whilst never once letting up, not when Cath's paws slipped up Chelse's shirt to feel her warm tummy, or to caress her breasts through her bra. Chelse attempted to slip her fingers beneath Cath's belt, but quickly gave up in lieu of simply untying the bikini top, tossing it aside and caressing the fox's soft breasts and firm nipples between her pawpads. Cath responded silently, still kissing the little mouse, by undoing Chelse's fly, slowly slipping a paw teasingly along the hem of her panties before making their way south. Only then did their kissing abate.

"You're wet," Cath nearly gasped, the kissing having taken their breath.

"It's that time..." Chelse said, with a suggestive smile, "...just like I told you."

"Oh, is it?" the fox said with a grin, pressing her paw into the soaked gusset further, still without breaking eye contact. "So did you leak or...?"

"...Or I didn't wear any protection," Chelse replied, both letting out a breath of arousal as the fox continued to rub harder, the two now growing more aroused.

Cath was the first to break character. She crawled down the mouse's body, grabbing her shorts and tugging them off in one quick, rough stroke. Her hungry eyes feasted on the mouse's lower half, observing the white cotton panties she'd clearly gotten in a cheap pack just for this; it was unlike the mouse to wear anything that wasn't cutely printed or vibrantly colored. They glowed like snow, the brand new cotton soft like velvet in her paws as she spread her partner's legs to find the one soiled spot on the now already ruined panties. The gusset had begun to stain in spots, on the outside only shades of pink and gold, with a deeper shade in a crease where the fox had just fingered her through the fabric. Though a bit disappointed they weren't already destroyed, Cath knew it was only a matter of time before they would become unmistakably, irreparably stained with a telltale free-bled gusset.

"My, what a dirty little girl," Cath teased, pawing at the front of Chelse's panties, stopping just above her mound, avoiding touching her, making her squirm as she stroked the mouse's ticklish triangle. "White cotton, tsk. This'll never wash out, little one. And they were brand new too! You're in big trouble little Miss." The mouse blushed; they had talked about exploring a bit of ageplay, and with her usual wardrobe, she fit the bill perfectly. Cath was a bit of a dominatrix herself, and seemed to be taking to this new facet of role-play extremely well. Already she felt her buttons being pushed. "Well, it just so happens," Cath continued, acting as if she were ignoring Cath's squirming on the bed as she unceremoniously undid her belt, dropping her shorts as well as a protective pair of plain black panties with a thick pad to reveal an equally plain white cotton thong, already stained a deep crimson, her inner thighs even bearing traces of pink. "...that I'm on mine too."

The mouse whimpered as Cath climbed back on top of her, this time making sure their legs were interlocked. Readjusting their position a little, they began to grind slowly against one another as they continued kissing. Chelse's swollen clit throbbed, and she began to whimper and arch her back as she became close. The heat of the room, the silky feeling of fur against her fur, the warmth and weight of her girlfriend and those slow, forceful thrusts from her girlfriend's toned body, were too much for her. Cath knew the signs, and ordinarily, she would have kept going. The mess would have made her finish even faster, but she wanted to tease both of them, to keep them on the edge. And so, as the mouse panted, she traveled down the rodent's neck, teething, sneaking in a bite here and a lick there, before pulling away entirely just as the mouse approached the edge of climax. In an instant, the moment was over, leaving the two panting, their sexes hot, moist, begging for more. Deep brownish-red staining from Cath's thong had left Chelse's panties even more disheveled, and the inner thighs of both girls were now hued pink. "You said you had more surprises," the fox said, as if justifying her pulling away.

Prior to their coming over, they had discussed at length a number of things Chelse especially had wanted to explore; Cath, though deeply interested in the world of kink, knew what she liked, though she was open to exploring anything her little closet hornball wanted. Chelse had chosen to remain mostly secretive, making only vague suggestions and refusing to "spoil anything." She had repeatedly asked if Cath trusted her, if she was okay with doing some things that were "really dirty" and even "taboo," to which the fox had simply affirmed. Getting the house to themselves, both early on their periods, was a miracle unto itself. Cath couldn't possibly imagine what else the mouse had in store for her, except perhaps her girlfriend's latest newfound fetish.

Cath once again crawled closer, leaning over the mouse and groping between her legs, lower this time. "Did you want to try your latest little kink?" She smiled a little, hoping to comfort her girlfriend. They both knew the kink was extreme, and Chelse had only reluctantly told her despite the two being entirely trusting of one another. She seemed to still carry with her some shame or embarrassment around her new favorite form of play.

"W-well, actually," the mouse now stammered, curling up a bit. Cath enrobed her in her strong arms, Chelse now leaning against the fox's breasts which poked out from beneath the micro poncho she still wore. "Yes, but, since we have a few days to ourselves, and we're both...we're in sync right now."

"Yeah?"

"There are a few other really naughty fantasies I wanted to try out. And I could do 'em solo, but it's just...it's REALLY hot with you here too. If you don't want to I can wait or not do 'em. Also...I don't really have to go yet, so I kinda want to save it a little too, heh."

The fox was grinning down at the blushing mouse, who continued to curl up and turn redder as she talked, her paws folding over her chest defensively. "Well, if you have something naughty in mind, you gotta tell me, cutie," she said, running a paw up and down her girlfriend's body from her panties up to her bra and back.

"Well...so it's really dirty, and we can only do it because we're alone."

"Whaaaat is it?"

"So umm...you remember the cub panties I bought?"

"Yeah?" Cath tugged on Chelse's white panties playfully.

"Well...I uh, my little brother's undies are kinda...about the same size. I was in the bathroom the other day and saw a pair in the hamper and they looked kinda cute and it kinda gave me a naughty idea and I know he didn't pack all of em for camp and like..."

"You wanna steal a pair of his undies and put 'em on for me?"

"Well see that's where it gets like, really dirty...I kinda wanted you to wear em too--"

"Ohh, you want me to be your little tomboy fox? Wearing my little tighty whities like a boy?" Cath set Chelse on the bed, sitting up to show off her ruined thong, tugging on the waistband teasingly.

"Y-yeah, heheh...and uh...not uhm...not take em off for awhile. Since we're, you know...and the pair I saw the fly was white and the rest was all printed and cute so I know he has a few we could wear like our panties right now."

"Oh, you wanna ruin them huh?" Chelse was visibly shy and nervous, but Cath began to tease her more in an attempt to loosen her up. She always let go when she was horny, and Cath intended to pry that horny little mouse out of her ball of nerves. "Such a naughty little mousie pinky, wanting to play dress-up with your little brother's tighty whities and play dirty like the boys huh?" She began to stroke Chelse through her gusset again, growing closer to hear her cute little squeaks through her breath. "And I'm sure you're gonna wanna hide the evidence afterwards huh? Or are you gonna be extra naughty and hide 'em right back in the drawer with all those clean undies and pretend they're not totally ruined?" Chelse began to nod, whimpering in arousal, begging the fox for release. "Mm, well you better go get 'em then, if you wanna be a naughty pinky. Go on, go steal your brother's tighty whites for us to ruin, heheh~!" She continued rubbing, stopping to edge her girlfriend any time she got close, waiting for her to get up, continuing to verbally tease her until she finally got up, panting, out of breath, yet hornier than ever.

Chelse took her by the paw, now slick with crimson discharge that only showed itself on the mouse's pale digits, and led her out into the hallway. Chelse's bedroom was at the end of the hall, with the bathroom being the next door on her left. Just a few feet beyond that on their right, though, was the door Chelse now opened, pulling Cath into the darkness. Before turning on the lights, the mouse pulled her into a deep and luscious kiss, slipping her tongue into her maw and wrapping her tail around the fox's thigh, squeezing in pulses. She gripped the fox's ass tightly, leaning up against her bare breasts under the poncho. Cath responded by holding on tightly to her lover, slipping her paws up her shirt and undoing her bra, surprised that neither of them had done so already. Chelse stopped to slip off her bra under her shirt, letting it hang in one paw and flipping on the light with the other. Her eyes bore lustfully into those of the fox, and she stepped closer once more. After one quick, hard kiss, she tore across the room to her brother's dresser, practically pulling the drawer off its rollers as she began to look through her little brother's underwear collection.

Like Chelse, all of his underwear were cutesie, his drawer a colorful collage of various cartoon characters, all of them printed on colorfully-banded briefs. She brushed aside any with a single color on them, looking at two specific types to decide between. The first were any where the fabric beneath the prints was white; some had large prints on the back and various frontal prints, while others had small prints all over them, using the same fabric pattern for the entire pair, but always exposing the white fabric between all those little prints. The second, rarer pattern Chelse was interested in bore colored fabric, with the same menagerie of print styles, save for a pristine, unprinted white fly. Eventually, she settled on one of each.

Turning around slowly with an evil grin on her face, a shiver starting to set in, she held up her two victims. The pair she offered Cath was white, with various little cartoon sharks printed all over them, some swimming in profile while others faced forward with big toothy smiles, with light blue elastic and piping. The pair she kept for herself was printed a solid red on the outside, with a cartoon of a rubber duck wearing a firefighter's hat on the back. A jet of water from the firehose gave a vibrant blue background to the cartoon against the red fabric. The front had another little yellow rubber duck and a little gold firefighter's badge printed on either side of a pristine white fly. The piping and elastic were deep ultramarine, and the inside was still white.

"You went for the littlest looking ones huh?" Cath mused, reaching for the pair Chelse offered her with a naughty little grin. Tucking a digit from each paw into the waistband, she held them up to give them both a better look.

"Well, I could've picked another one, but it wasn't white! Had to pick one you'd enjoy making a mess in," the mouse stepped closer, leaning in to the fox's unpierced ear, "and I KNOW how much of a mess you like to make on your period." She bit the ear tenderly, lustfully, just a bit too hard. The fox let out a murr, gripping the mouse tightly with her claws.

"Let's go put these on then," she purred. The two moved quickly, their bodies pressed right up against each other as they made their way back to Chelse's room. Their ruined panties fell to the floor in each other's paws as they stripped one another, keeping their tops on. Chelse was the first to step into her little brother's tighty whities, only to find the room once again tumbling before her eyes. Cath tossed her back up onto the bed, the little briefs dangling from her ankle, her legs spread before the fox's hungry maw. She wasted no time before diving in, lapping hungrily at the mouse's stained folds. Her pussy was juicy, dripping with cum and blood, the constant edging and anticipation only increasing the quantity and potency of her musky flavor. Chelse let out a cry somewhere between a moan and a scream, taken completely off guard by the fox's advances. Her legs quivered on Cath's shoulders, her tail curling around the fox's arm, and she quieted herself by sucking hard on her thumb. Cath remained observant as she ate her out, smiling up at her with a reddened maw. "Good little pinky," she teased, before going back down on her, this time slipping her tongue as low and deep within her as she could.

A warm gush of flavor greeted her as the mouse finally popped, her back arching as she squirted all over Cath's muzzle. Blood and cum dripped down her muzzle as she closed her eyes, lapping lovingly an hungrily swallowing Chelse's squirting pussy in her maw, gulping down a few wayward squirts of piss as her tongue tickled Chelse's clit. She swallowed slowly, savoring all of her girlfriend's flavors as they mingled in her mouth. Above her, Chelse quivered, moaning through her thumb, which she now bit down on, desperately trying not to allow her mousie front teeth to bite down all the way. She pawned weakly at the sheets with her spare paw, her tail constricting like a snake around Cath's arm to the beat of her heart.

When her climax finally subsided, Chelse's body went limp, her tail uncoiling and falling against the side of the bed. In her daze she could barely make out a warm weight as Cath crawled up on top of her, kissing her slowly, sharing the blood on her tongue. Finally, after holding a slow, lustful kiss, Cath climbed off of her, grabbing her wrist and slowly pulling her back to her feet. They still hadn't even gotten dressed yet. Chelse's vision finally came back into focus to see Cath smiling at the little pair of undies she'd been given. She held them in her paw, the unprinted inside of the fly facing upwards in her palm as she stroked up and down her thighs, revealing to Chelse the deep, almost black trails of blood and sex that had dripped from the fox's aroused cunt, now smeared in pink and red streaks across the pale fur on her inner thighs. Holding up the undies to inspect them revealed a pale red stain already rubbed into the fabric from using it as a napkin. Chelse could practically smell it, still swooning from her first climax as Cath locked eyes with her. She watched as the fox stepped into the little briefs, one paw at a time, before slowly pulling them up her long legs. The elastic crackled at the strain of being pulled tight over a figure larger than their size, and the ribbing of the cotton drew out, the characters appearing ever so slightly faded and distorted. Cath pulled the waistband taught, only about an inch or two from her hips, and let it snap playfully. "Your turn," she teased, pointing with her snout to the pair that still hung around Chelse's ankle.

Looking down, then back up at Cath, then back down at the little undies, Chelse reached for the elastic waistband in each paw, stepping into them before sliding them up her thighs. Her eyes followed the fabric closely, watching as the fabric of this pair too was pulled taut, the white fabric beneath the red print making them ever so slightly pink. She could feel her pussy continue dripping honey as she heard stitches pop, feeling the little vibrations around the leg holes as they stretched over her adult thighs. She pulled them up tight, but found herself unable to contort them the way she had expected. They neither came up high on her hips, nor conformed to her camel toe; they were too tiny to come above a medium-low rise on either of the girls, about an inch or two shy of their tails, and the double-layer fly of boy briefs remained flat and unwrinkled over their crotches, revealing no alluring folds of a camel toe. And yet, they were perfect. The tight fabric, stretched to expose the ribbing of the cotton, reminded Chelse of the taboo nature of their play: stealing her little brother's undies just to destroy them. The adorable little cartoon characters smiled back at her, not failing to flip a switch somewhere in Chelse's mind. There was just something about anything cute and colorful that turned her on. And that crisp, white cotton, making Cath's ass and Chelse's crotch gleam in the tunnel vision of her arousal. Both girls knew they would not remain so clean for long.

After a moment of admiring the tight fabric on each other's forms, the two once again stepped together to kiss, their paws immediately drifting to the cotton stretched over the other's hips. "Mm, this feels dirty," Cath said, kissing her girlfriend lustfully, squeezing her backside tight in her paws, stroking the sides of her hips eagerly through the fabric.

"It's really dirty," Chelse panted, kissing her back hard and letting her paw dive straight to Cath's crotch, pawing through the thick fabric. "And I love it so much."

"We're gonna free bleed in these."

"Oh yeah, we are. And we're not taking 'em off until they're ruined." Chelse interrupted herself with a myriad of kisses, making nips at Cath's cheeks and neck, receiving them in return, whimpering at the fox's sharp fangs. All the while, their paws continued to fondle and grope at one another's hips. "I wanna have sex in these."

"Mm, you freak," Cath said, a bit more aggressively now, squeezing her backside harder, "but fuck is it hot when you're horny." She smiled, pushing the mouse back playfully, and walked over to her bag. "But! We have all day to ruin these, so I think I'll make you wait. Maybe we should lay down, put on a movie or something, let it flow a little. It is our first day, so...I'm thinking we can completely drench these, maybe even get a little messy with it, easily. Right?" Chelse only nodded. Her loins were on fire, deprived of anything besides a basic fap here and there for the last three months, and here she was with Catherine bent over in front of her, in her room, bleeding into a pair of her brother's undies right in front of her. Her nose tingled with the pheromones hovering in the room from just this first hour of play.

"I think, just for insurance," Cath said, pulling out her laptop and setting it on the bed. She then grabbed Chelse's pillow, tugging it out of the case, "we should have something absorbent under us."

"W-well," Chelse stammered. Sleeping in the fox's musk would be heavenly, but the pillow was now unprotected. She was conflicted between arousal and avoiding trouble.

"Would you rather I grab one of your teddies?"

"Mmh, fuck Cath, later," Chelse giggled, pushing the fox over onto her side on the bed and crawling up after her. "Actually, my new bed is protected. All I gotta do is wash the sheets. If you wanna get real dirty though, I can pull out my old mattress."

"The one you tore a huge hole in?" Cath cackled, "and used like a toilet?"

"Yeah, I kept it! It's under my new bed. It's for...y'know...just in case. If I wanna get really naughty. Like if I start getting the urge to take the protection off and see what kind of stains I can make...." She began to lean closer before laying down on her belly. The two silently agreed that possibility would wait.

The two ended up crawling under the comforter and blanket, cuddling up right on her colorfully printed sheets. The laptop was propped up on her nightstand, a movie put on for them to watch. Chelse set her pillow beneath her chest, propping her up so she could lay on her tummy, hoping to let her flow pool and ooze up the front of that clean, white fly. Cath, meanwhile, shed her poncho before crawling up onto Chelse at an angle, adjusting herself periodically. She was experienced with period play, and fully intended to ruin these little briefs for Chelse. With a couple of adjustments during their cuddling and some sneaky help from her paws, she began to make little stains all over the briefs, settling the longest on her side.

The pair spent the remainder of the day in a tense state on the edge of instinct, Taking breaks here and there to make out and touch one another more, usually after lifting the blankets to check on the state of their stolen undies. Twice Cath became aggressively horny, touching herself and Chelse, begging for release, but both times being shot down with a playful whip from Chelse's tail. They put on a full queue of movies for the day, stopping only once the two became too hungry to continue. They quickly put in an order for take-out that they knew would arrive shortly and be simply dropped on the doorstep, allowing them more privacy. Crawling out of bed after nearly five hours, the two assessed the damage they had done in full.

"Oh, you naughty pinky," Cath murmured, noticing first the pale stain on the bed as she crawled out of bed behind the mouse, before being given a face full of musk as Chelse turned around, revealing a deep scarlet crawling up the front of her brother's undies. Though not yet shimmering with moisture or leaking, the stain was deep-set, likely irremovable in its entirety, and unmistakable against the remaining inches of clean white fabric right up the front. The deep blue piping had even begun to darken to a warmer shade of indigo. Despite the urge to take her now, Cath knew it could spread much, much more.

Chelse turned to meet her girlfriend's gaze, blushing at the tease, and was met with a panting snout inches away from her crotch. Looking down at herself, she could see why, and she relished the feeling of wetness between her legs. Throwing the blanket aside, she looked down at Cath's own pair of undies, gasping at what she saw. The fox had somehow left little smudges all over the little undies, staining all those little rainbow sharks and the sea of white they swam in. Between her legs, none of the sharks were even visible through the red tide that had begun to run down both the front and back of her legs, tainting the light blue piping with a dark brownish-red and spreading out in ragged shapes into the printed fabric, threatening the remaining sharks with a similar fate.

"Mm, speak for yourself, little kit!" She squeaked back, helping Cath out of bed. "Look like there's blood in the water, and those little sharks are making me hungry."

Cath laughed. "Oh god, awful pun," she teased, pushing Chelse away. "Nope! Dinner's officially first now. Damn that was bad! Hahah, the way you said it was really hot, but I'm sorry, that pun was unforgivable!"

The two of them laughed, Chelse playfully swatting at Cath, the fox returning the gesture until it became a game of tag, then a game of chase as they raced one another down the stairs for their food. After a quick and surprisingly uneventful pee break (the first of their interaction), the food arrived, and after a little dare, Chelse tucked her top half out the door, still covered by her shirt, and snatched up the bag, hoping there was no one nearby.

The brown bag ended up being carried right back up to Chelse's room; in their current state, there was nowhere they could sit in the common area of the house. Cath took a seat at Chelse's desk, letting the mouse sit on her lap. She could feel the warmth and moisture seeping through the little briefs that had only hours ago been adorable and pristine. The two relaxed a bit as they ate, but were unable to fully relinquish the sexual tension that had remained between them the entire day, especially with Chelse straddling Cath's lap.

"Okay," Chelse said as she finished up, turning around in her seat to straddle Cath's hips, "I need--"

"Can't go swimming after a meal, cutie, you'll get a cramp!" Cath said mock-innocently, grinning at her own terrible joke. "Besides, we have more movies to watch!" She lowered her voice suddenly. "These little pinky-pants can hold a LOT more, and I'm not letting you put them back half-finished." The two looked at each other for a moment, Chelse silently begging, looking down at their undies. She knew what Cath meant, and she knew she wanted it too. But her body craved release. To be fair, the fox's did too; it had been for a long time now. "I'll tell you what," Cath said, pushing Chelse off gently so they could both stand. She walked over to her bag, once again flashing Chelse the bright crimson at the bottom of the fly. The stain had begun to bleed beyond the fly and into the back side from sitting the last half hour, and Chelse could feel the same sensation in her undies. Reaching into the bag, Cath pulled out a wand. "We can...help ourselves along. Make things go a little faster and have fun at the same time."

"That sounds...mmf, yeah," Chelse said, padding back over to the bed. Cath followed right behind her, crawling underneath the mouse so they lay face-to-face. She began to reach around her girlfriend with the wand, but Chelse's tail grabbed it from her. "I got this," Chelse said softly, squeezing the handle gently. The wand came to life with a gentle roar, buzzing in her grip. Looking into each others' eyes, they both spread their legs a bit, Cath straddling Chelse's hips, as Chelse lowered her tail between their legs.

The two began to grind against one another slowly as they felt the vibrator pressing against them through the damp fabric of their blood-soaked undies. Their eyelids grew heavy, and yet they held eye contact, Cath's paws tracing up and down Chelse's body as she held herself up a bit to keep their hips aligned better. Leaning down, Chelse began kissing Cath, squeezing the wand once more in her tail and feeling it begin pulsing. Their breath grew heavy as they began to grind more aggressively, their paws now wandering, fondling as Chelse lay down on Cath to free her eager paws. Both felt a damp, warm, sticky sensation as their honey mixed with hours of gooey discharge, each desperate to ruin their stolen underwear, and even more desperate to cum. With the blanket tossed aside, the two were completely exposed, yet neither had a clear view of the stains as they pressed against the toy. Squeezing Chelse's ass hard through the little briefs, Cath pressed herself roughly against the mouse's hips, rewarded by the mouse granting her a firmer press from he wand. With a gasp, Cath felt herself cumming, grasping for the wand to direct for herself, but instead spanking Chelse hard, her claws sinking into her girlfriend's soft, pale fur as she rode hard against the toy, feeling herself convulse a few times before she began to squirt. The tight fabric around her waist grew even warmer than it had been as her ejaculate hit the sodden material. She didn't hold back at all as a moan escaped her maw, throwing her head back and exposing her neck to the horny mouse, who eagerly bit down as she too began to climax, her own ejaculate much more heavy. With the wand only barely held in her shaky tail, their shared orgasm was over fairly quickly, and yet, with a little leg work, the two arrived in a position where they continued to milk their pulsing sexes against the other's thigh, leaving dark streaks in their fur and kissing aggressively between moans and gasps for air.

Normally, the pair might have collapsed into a cuddly pile, at least for a bit, but the two had been without one another for months, semi-public hand jobs aside, and they had been leading up to this release all day. The two fell onto their sides, fingering one another roughly, making sure to rub their filthy fingers on one another's undies, now leaning back enough to observe the damage as they completely ruined the two pairs of underwear. Chelse looked down at both pairs, at the red smear that went from between her legs all the way up to within an inch of the waistband, the entire once-white gusset stained irreparably, and the similarly dark trail from Cath's crotch all down one leg hole, at the myriad of bloody fingerprints and smudges of sex and period stains that coated the little cartoons. The sharks on the pair Cath wore were now all faded, hidden behind pinks, reds, and beiges, the prints beneath the red tide long gone, and her own pair now bore several deep smears across the little rubber duck on the front, thanks to Cath's deft paws. No doubt the back side of her underwear was just as ruined. No, not her underwear, she thought to herself. Not Cath's. She reminded herself that these were her little brother's tighty whities, stolen right from his clean drawer. She thought about Cath teasing her earlier as they fingered each other now, about how they would have to hide the evidence, about how Cath had mused they could simply put it right back into the clean drawer, still dripping and red. Cath shoved three digits into her hard just as another climax approached, as well as another of her secret fantasies....

"My wrist--hah, this is hard," Chelse panted, reciprocating Cath's rough finger-fucking by inserting her own digits deep inside the fox, using the tight elastic waistband to catapult her deeper, rougher, into her partner.

"Yeah, but it's so fuckin hot," Cath growled, nearly pulling Chelse's hips with her as she fingered the mouse hard beneath the soiled undies.

"Mmh, Cath?" The mouse had to steal her words between breaths.

"Yeah?"

"I've got an idea."

"Mm, another one?"

"Yeah."

The two let up just enough to be able to talk more easily, though Chelse kept the fox on a short leash, making her swoon by wafting her bloody fingers across her girlfriend's mouth before forcing them into her willing maw to suck on. "Remember when I said I wanted to try out a few dirty fantasies of mine?" The fox nodded obediently. "Well...I think we can try another one while we still have my little brother's undies on, and make it extra naughty."

Cath slipped Chelse's digits out of her mouth, smiling. "Do you have to go now?"

"No, not that! Not yet anyway," Chelse blushed; even in this state she still felt embarrassed. "Besides, these are too tight. It'd be really hard." She paused before meeting her girlfriend's gaze. "So there's this toy...."

"...Yeeeeess?" Cath said, once again finding it funny but also annoying at this moment that she was still reserved in her fantasies.

"My baby sister has this toy. And I've wanted to fuck it ever since I saw it," Chelse confessed, finding her confidence as soon as the words left her mouth. "It's just...so naughty. And holy shit do I wanna fuck it. And I want to keep these on." Her excitement grew; she began to work herself up as she talked dirty. "I want to fuck my sister's rock-a-stack in my little brother's tighty whities."

"You ARE a freak!" Cath mused. "Fuck that's dirty. But how are you gonna do that when these tidy whities are so tight, huh?"

"Follow me and I'll show you." Chelse crawled out of bed, shedding her shirt to expose her firm nipples before turning on her heels. She walked with purpose, right out the door and all the way down the hall, into the room closest to her parents' bedroom. Flicking on the light, she walked across the little foam puzzle squares on the floor directly to the object of her desire. Cath ran after her, shocked by her girlfriend's sudden directness, only to be met with a teasingly taboo sight. Chelse sat spread-legged on the foam floor, the rock-a-stack between her stained thighs, standing tall in front of the little pair of blood-soaked tighty whities around her waist. Her eyes gleamed lustfully back up at Cath, and she licked her lips.

"I'm about to turn my little brother's tighty whities," she said, gripping the piping on the fly in one paw, slipping the two fingers she could fit inside the fly, "into the cutest, HOTTEST, most TABOO pair of fucking lingerie," She pulled hard, tearing the fly wide open. "And I'm gonna fuck my baby sister's little rock-a-stack," she continued pulling, tearing the first strip of sodden fly fabric clean off and dropping it on the floor, "like the fucking dildo it is." She tore out the second piece, exposing her messy pussy, her fur matted with a rainbow of warm, gored colors. Tossing the second piece aside with the first, she looked back up at Catherine, who stood in the doorway, simply taking in the scene as if watching a video. "I bet you I can fuck this thing harder than you."

"What?" Cath replied, still taken aback by the sudden ferality. She was taken aback, but she was also incredibly horny. Though Chelse had just torn off the stained fabric Cath had lusted to see her in, the mouse's sudden dominance and desperate arousal triggered an instinctive response within her.

"I said," Chelse got up, crawling over to her girlfriend and gripping the fly on her own briefs, "I bet I can take it deeper than you."

Cath grinned, pushing Chelse onto her back and crawling on top of her. "Oh yeah?" she teased, attempting to straddle the mouse's face. Chelse rolled out of the way; as much as she would have enjoyed it, she had something else in mind. Grabbing the shredded pieces from her briefs, she shoved them in Cath's mouth. The fox moaned; it was her turn for buttons to be pushed. She knew when she was the sub, and she only squirmed in playful protest as the mouse forced her onto her back, spreading her legs open. "Oh noes, it looks like my little kit had an ACCIDENT," Chelse barked, placing emphasis on the last word as her paws tore at the fly on Cath's briefs. "Guess we're just gonna have to CHANGE her." She made quick work of Cath's soiled underwear, taking the bloody fabric to her nose and inhaling deeply as she gazed at the fox's exposed pussy. Cath felt the breeze of her moist sex as it was exposed, chilled even more by the mouse' deep breath as she took in the sight of the vixen's folds. "Mmh, much better."

"Now," Chelse pulled Cath back up into a seated position, grabbing the stacking toy and placing it firmly on the floor between them. It waved gently back and forth from the force she put it down. It stood about eight inches tall, with each ring growing wider in tandem with the center rod. Each of the seven rings followed a color of the rainbow, with its base and center being white. The base was smooth, being baby-proofed, and had a slight flare at the top to prevent the rings from simply rolling off when the toy was rocked. Though not large for a sex toy, the act itself made it far more intimidating. "I bet you can't get past green."

Cath spat out her gag, looking around the room and letting out an incredulous caught before smiling back at Chelse. "You wanna take--"

"Right here, right now. I'll even start," Chelse got up, pulling the first ring off. Cath noticed that her girlfriend was quivering; even in this state of sexual desperation, the aggression was an act. She seemed anxious; this was clearly something she wanted to do, and yet, she was overwhelmed. Cath decided to help her relax by playing along. "You sure you can even fit that flare? A little pinky like you?"

"Mmh, easy, watch," Chelse grinned back. The reassurance from her girlfriend filled her with an aroused confidence, and she positioned herself above the toy on her knees. Spreading herself, she touched the toy to her opening, gasping at the feeling of the cool plastic. Keeping the act up, she confidently sat down hard on the toy, letting out a gasp as it popped into her. The toy was around an inch across, about three inches in girth, and its flared tip, though rounded, was unforgiving. Her clit hammered against the orange ring as she went down on the toy, and she gritted her teeth in aroused shock. Opening her eyes, she smiled back at Cath, teasingly bouncing a few times before pulling off. "Mmf, See? Nyah--your turn."

Cath looked down at her undies, then back at Chelse, before settling on the toy as she straddled it. The tip was now smeared with a greasy red mix of Chelse's cum and period discharge, and slid more easily into the fox. Thinking about how she was inserting Chelse's period blood in her pussy made her hot, and she closed her eyes and rode on the toy for a few seconds before nearly falling over, giggling. "Whew!" She gasped, placing a paw on the tower to stabilize it. "Really works out your legs. And moves a lot more than I thought."

"Yeah, but this is so hot," Chelse said, eagerly pawing for the toy. "You gonna take the next one, or do I gotta go first again?"

"Mm, well I figured since you're just so eager to play with your sister's toys," Cath teased, taking off the orange ring, "but if you insist."

Given the size of the toy, the challenge itself was fairly easy, and their little game progressed quickly, save for their role-playing. As she pulled off the yellow ring, Chelse noticed a spot of blood on the lightly colored plastic, and pulled Cath close, running the ring between her folds and turning it like a wheel, leaving a slick trail around the outside of the shape which the mouse licked off slowly as she mounted the toy once more. "Mm, I fink I taste your hymie," she teased, "yoo musht be new to this. You sure you can take et?"

"I fink I'm bigger'n a widdle pinky wike yoo!" Cath stated matter-of-factly as she mounted the toy, grinding hard on it to prove it was all the way in. "And it is NOT my first time, stinker!"

"Who you callin' stinker?" Chelse called back, the two giggling, playing with more energy, riding with more vigor as she tossed aside the green ring. "I ain't done anyfink stinker-y yet!"

"Oh, but we bofe know you will," the fox said, nearly pushing her girlfriend off to get another turn at taking the toy deeper. "Iss just a matter of time." The shaft was now ivory, with veins and brushstrokes of reds and oranges down its length. Only one more ring remained, as she tossed aside the blue ring before handing it back to Chelse. The two locked eyes, grinning at one another.

"You seem eager," Chelse said after a pause, pulling off the violet ring and skipping right to the bare shaft, "and so am I." Forcing herself down on it once more, she spread her legs, taking it deep inside her. "But we still gotta wait till--mmh, after this at least." She rocked back and forth slowly, her eyes never leaving the fox's as she began to ride the toy up and down like a dildo. She slipped back into character as she slipped the toy out of her. "Looks like I won, huh?"

"Mm, I guess you are a big girl after all," Cath said, leaning closer, a paw guiding her over the toy. The crease where the base met the shaft was now coated in a dark red circle, the entire shaft slippery and stained with their combined juices. "Mmh but so am I, and Ima prove it!" she said, pressing herself down onto the toy and riding it. For the first time, Chelse let her mind leave the game, taking in the sight of her girlfriend riding her sister's toy in her brother's destroyed underwear, and her hand went right to her loins, now extensively warmed up. Cath's eyes drank in the sight of Chelse pawing off to her just as quickly as the mouse took her in. Just as their eyes began to grow heavy, Cath slipped off the toy, gripping Chelse by the arm and pulling her close, forcing her paw away from her pulsing loins. "You want me to show you an extra-special game the adults play?"

Chelse smiled and nodded. She had a feeling she knew where this was going, and she wanted it badly. "Can we take...?"

"Of course! We gotta clean up after playtime, silly," Cath gathered the rings and stacked them back on the toy, before kicking it over by the toy box. She then gathered the ragged strips of fabric from their undies and wiped herself on them before standing. "There, all cleaned up!"

Chelse's mind spun. "Buh--"

"What, you don't wanna leave it here? And maybe we can go drop these pieces off in your brother's drawer, come back to return the rest later? When we're done with them, of course," Cath grinned. She loved to watch the mouse's head explode. Giggling softly, she scooped up the toy, then offered a paw to pull Chelse up. "Of course we're gonna clean it up silly. I can't go this long without you again. Besides, I think we might just have to play another round of 'pinky stack,' back in your room," she finished with a wink.

"Hey!" Chelse giggled, playfully punching her girlfriend's muscular arm. The two once again chased each other back into her bedroom, slamming the door even though they were alone. The rock-a-stack was set on Chelse's desk, to be dealt with later. With both of them now wearing only the crotchless briefs, prints hardly visible on either pair, Cath walked back over to her bag to pull out some much-needed lube for a familiar favorite toy for them: a double-ended dildo with a textured shaft.

Though she assumed her position on her back on the bed, Chelse was surprised when Cath did not crawl onto the foot of the bed to mount her in their usual position. Instead, she set the lube and toy down on the nightstand before crawling onto the bed right next to her, throwing a leg over Chelse's shoulder. After a day of free bleeding, teasing, sexual games, and not wiping after peeing, both girls were filthy, and the musk of their period and urine was strong. Chelse took in the intoxicating scent, as well as a few surviving little sharks staring back at her. She grinned evilly at them, thinking to herself how dirty she had been, before diving eagerly into Cath's cunt.

The fox moaned in surprise; she had barely spread the mouse's own legs before feeling an eager maw followed by a warm tongue. She too was eager, and dug in hungrily. It was several minutes before the two ceased, both expertly exploring the other's swollen sex and lapping eagerly at the feast of filth they were presented. When finally Cath crawled off of Chelse, reaching for the toy, the two were quivering, panting messes.

The two fucked hard and long, pausing several times throughout the next two hours for various reasons. Several times, when one partner would climax, the other would press cruelly deeper, grinding harder. A few times, the two collapsed in a sweaty pile, humping weakly to milk the sensation, but panting in exhaustion. Finally, the two grew tired, and they shed their ruined briefs, the fabric itself stretched out and no longer crackling or resisting as they stripped. The sheets were now thoroughly damp, marks of various colors from throughout the day mingling with the fresh moisture of sweat, sex, cum, and even piss and blood from their ejaculations and discharge. And yet, too tired to move, the two lay lovingly in the other's embrace, face-to-face, hips and chests pressed against one another in a Y-shape, cinched by Catherine's embrace at the hips. Chelse's arms draped around Cath's shoulders affectionately, and the two exchanged gentle kisses before drifting off into a peaceful, exhausted sleep. Nothing could ruin this.