"Anna, are you ready to go?" a voice rang out through the house, answered a second later by a frustrated, high-pitched version of itself.
"Mommy, I've been ready forever!" the little wolf cub huffed, annoyed at the insinuation that she was the one holding things up.
"All right, don't get your dander up. I'm just asking..." Anna's mother replied, the she-wolf's fluffy mane peeking up through her apron as she set a few last tidbits into a basket she was starting to doubt her youngest child could carry. But Anna was determined to try, and Vera was equally determined to sleep in.
One look down at her little girl told her that the eight year old was committed to making the delivery. It was in the wag of her tail, the glint of her eyes, and the way her little incisors flashed through a proud and determined smile. She was going through the woods all alone! The notion made the motherly wolfess smile. The property between their house and her mother’s wasn't all that big - just a low-lying plot planted with willow trees to help control flooding and erosion, but it had been 'the woods' to Vera while she was little and she'd passed the notion down to her little sister. It was also completely safe and too small to get lost in, but Anna seemed to enjoy the notion that she was braving a barely tamed wilderness to bring her grandma some home-cooking. And since her ankle was still only half healed, the old she-wolf loved having her grandkids over to keep her company.
"Here you go... now are you sure you can carry that all by yourself?" she asked as her little pup hefted the bulky basket. "Maybe I should just get Vera to join you..."
"Mom, Vera studies and works hard at college, you should let her get some sleep while she can!" Anne piped.
"Did she tell you to tell me that?" the wolfess asked, knowing what an insidious influence her elder daughter was on her younger.
"She didn't tell me to tell you..."
"Okay then, you run along, and if Vera wakes soon I'll tell her to come and join you..." the motherly wolfess said, wondering how long her temporarily returned daughter would sleep in...
*******
Vera wasn't sleeping. In fact, the manned wolfess had been having trouble resting since she came home for summer break. Her dreams were very restless and had resulted in the sorts of accidents she hadn't experienced since hitting puberty. Or being hit by it, since herms like her tended to have a high sex-drive, and it took a while to get used to it. And she knew that she could keep it in control now, only letting it lose when she was with someone cute and eager, and hopefully somewhere private.
Most of the times it was girls she was sneaking off with, although she wasn't averse to a boy as long as he was the curious and submissive type. In her opinion she had a lot to offer to both sexes - a never-ending wellspring of stamina, a flirty personality, and a body with some knock-out curves. She liked to joke with prospective partners that if they let a guy knot them they'll get bored waiting for it to go down after the first few minutes. Whereas if they let her tie with them, at least they'll have some bouncy boobies to play with.
She'd considered trying the flirty route with the special someone haunting her wet dreams now, but she doubted it would get her anywhere. Anne was too young to really get flirting. Like with most anthros her body was going through those special changes before her mind did. Vera remembered herself at that age - unable to understand why the sight or smell of certain people made her thingy come out. She hadn't been home for more than three days when Anna went into what must be her first heat. She already had a hint of hip and estrus had made her budding breasts swell up just a little, enough to make Vera's paws itch at the thought of getting to squeeze and pinch them. The place she grew up in was nice, but it was also the boonies, so there was no opportunity for a casual hookup that might have cleared her thoughts. Instead, the young wolfess would be forced totake what she wanted, even if she knew she probably shouldn't.
"Well, it's not really wrong though. I'll make sure she gets hers, even though she doesn't even know what it is. And mom has been going on at me about grandkids, so she can't really complain..." she thought to herself as she took a last look at her 'supplies'. She was worried about the family matriarch, since the wolfess had made it clear during Vera's life that she would never get too big or too old for a spanking. And when Vera was sixteen and came home from a party drunk and apparently too sassy, her mother made good on the threat. Which was why she was going through all this trouble to keep either her or Anna from knowing who would soon enough be breeding the white-brown pup.
Anna had still been waiting for her mom to finish packing when Vera made a dash towards the 'woods' in a long coat and nothing else. When she was among the willows and out of sight, she shrugged the coat off and got busy with her supplies. It was the better part of an old Halloween costume - some temporary fur die and a fierce-looking half-mask for the top of Vera's head. The outfit had included torn cut-off jeans and a shirt with a scandalous amount of rents and tears, but she didn't need that. To keep an even younger Anne from going into the woods alone, she told her there were wild werewolves living in it, just waiting for a cute little girls to eat up. And so a werewolf she would be!
She shook the spray can and began applying the creamy color to the distinct purple parts of her fur, figuring that the brown parts were sufficiently werewolf-like. After she was done she got some fur oil and smoothed down her mane before running her fingers through her hair to make it look stringy and unkempt. The mask went on last, the long fangs hanging down from the top of the fake muzzle making her look fierce, at least enough to intimidate an eight year old.
Vera didn’t have long to wait, and the breeze blowing her way and carrying the sweet scent of her sister’s heat told her she’d guessed right that the girl would pick this trail. She felt a grin spread across her muzzle at the thought of the fun she was about to have with her freshly flowered sibling and she did her best to work it into a fierce teeth-bared visage of a feral wolf before leaping out in front of Anna. She’d been ready to chase the girl and quiet her down if she tried to scream, but to her delight her sister just let out a short squeak before dropping the basket and standing frozen in place.
“And what do we have here… someone sneaking around in my woods?” she growled, trying to sound serious. Anna’s expression was priceless, the fruition of all those scary stories she’d told her about werewolves lying in wait for defenseless little girls.
“Wha… I wasn’t… I was just…” the girl stammered. Genuine fear, and no sign that she recognized her sister under the Halloween disguise.
“Just coming in here to steal a basket full of my hares?” Vera asked, trying to sound sinister. The fact that her nostrils were flaring was helping, making her look very much the ravenous beast she was pretending to be.
“N-no! This is… I’m bringing some food to my granny. Honest!” she said, opening the basket and showing the trove of home-cooked goodies inside.
“Hmm, no fresh meat I see. At least not in the basket…” Vera mused, eyeing her little sister. The hungry look in her eyes really seemed to make Anna believe she was in danger of being a wild beast’s lunch.
“P-please! Y-you can’t… I’m a wolf too!” the girl insisted.
“You are? A puny thing like you? And what do you call this?” Vera asked, putting a bit of growl in her voice as she circled her sibling and ruffled the fluffy fringe under her neck.
“It’s my mane… but I am a wolf. Honest!”
“Well, if I chose to believe you, I’m still a big wolf and you’re just a pup. And if you are what you say you are, you know all about what good pups are supposed to do for their elders…” she hinted.
“Y-you can have anything from my basket. You can have it all, just please let me go!”
“I’m a wild beast girl, I have no interest in this sort of food…” Vera said, an outright lie. 
She’d missed her mother’s cooking while at school and would have happily pigged out on the contents of the whicker treasure trove if not for a much sweeter smell triggering a different hunger. Without looking down Vera could tell several inches of her shaft were already out in the open and could feel a bit of wetness just behind her swollen sack. Her slit would remain unfulfilled today, but not her more masculine assets. The smell of a female in heat always but her in the mood to breed and she could feel her heart starting to race at the thought of her little sis squirming and squeaking with a nice fat knot lodged in her young cunny.
“Then… I’ll do whatever you want! What pups do for older wolves!” she said uncertainly since she had no idea what that was.
“Am I still supposed to believe you are a real wolf while you’re wearing those clothes?” Vera mused, and managed to hide her delight when Anna got the hint and started to scramble out of her clothes.
Her mostly white fur had a few large patches the color of coffee stains, accentuated by her honey-blonde hair and tail, kept meticulously brushed by their mother. Her hips were just coming in and heat had caused her little budding boobies to swell up a tad, hinting at an amazing body that would develop in the years to come. But as far as Vera was concerned, there was plenty to appreciate in the girl as she was now – cute, innocent and just ripe enough for plucking…
“So, a pampered wolf, but a wolf nonetheless. All right then pup, come here and show your respect…” she said, beckoning the girl closer as she eyes the little pink patch between her sister’s legs. “There’s a good pup… now open your muzzle.” She said once her sister was in front of her and face-to-face with Vera’s emerging cock.
“Wh-why do I…”
“I said open your mouth pup! Or maybe you’d rather I opened mine…” she growled, showing off her teeth and trying not to grin as the terrified girl’s muzzle popped open.
“Just like that. Good pups do as they’re told. And you’re going to be a good pup for me, aren’t you?” she asked, sliding one hand into the thick blond hair on top of Anna’s head.
“Esh…” the girl replied the best she could without closing her mouth. She still wasn’t sure what was going on, but she was casting a worried look at the red rod now inches from her face.
Using her other hand, Vera pulled her sheath down until all of her shaft was free, knot included. The red length was now no longer sticking straight up, allowing her to aim the leaky tip towards that adorable muzzle, opened and waiting. She could see Anna tensing at the sight and the girl tried to struggle once the lupine meat touched her tongue, but Vera had been ready for it. Her grip on her sister’s hair was firm and before the pup knew what was happening the elder lupine had shoved almost four inches into that pretty little muzzle. The long, low growl Vera let out was genuine, her heavy sack twitching as the warmth of her little sissy’s mouth enveloped it.
“There’s a good pup. Make sure I don’t feel your teeth unless you want to feel mine!” she growled, enjoying the way Anna was squeaking and squealing into the lupine length muffling her muzzle.
Fuck, she looks cute with my cock between her lips! Vera though as she drank in the sight of her younger sibling’s blue eyes wide and crossed as she tried to focus on the rest of the red lupine meat still sticking out from between her lips. Vera would have like to give her tine to get used to having a fully-grown cock in her pretty little muzzle. She would have like the time to let her sister play around with her a little, get a feel for what a boy wolf’s parts felt like, maybe even let her wrap those cute lips around her stiff nipples. Bu the smell of her sister’s heat was driving her crazy, and it was taking all of her self-control not to just muzzle-fuck the poor girl.
“There’s a good pup. Just breathe through your nose, and when the time comes swallow as much as you can…” she said as she pushed deeper into the confused girl’s mouth.
She didn’t really have any skill but just the sight of her suckling the fat red rocket was getting Vera going. By the time the red knot booped Anna’s nose she had a few inches in the girl’s throat and knew this would be just a fast and messy prelude to the serious fun. She savored the tightness of her sibling’s gullet but figured Anna wasn’t really ready to deep-throat her so she pulled back and began to breed the girl’s muzzle at a slow and steady pace.
The pup obviously still had no idea of what was happening to her, or what was in store. Her tail was still between her legs and she was obviously too frightened to be curious about what was going on, but Vera could see her little nostrils flaring, taking in the scent of an aroused male without Anna being aware of it. And while it would have been fun to have an eager pup lifting her tail for her, Vera knew she could have just as much fun playing the part of the big bad wolf and rutting her little sis like a wild beast.
These thoughts were like oil on a fire, and before she knew it Vera’s hips were moving quickly enough to force her sister to put her hands on the ‘wild’ wolf’s thighs in a feeble attempt to slow her down. She was still squeaking and gasping, struggling to keep her muzzle open enough to allow a fully-grown lupine cock to rut it. Vera felt her sack pull up, the heavy lupine testes twitching as her body prepared to dump its first load into the unbearably adorable little girl struggling to suckle the slick red shaft.
With a firm grip on Anna’s hair Vera pulled her face forward, stunning the girl by sheathing everything apart from her knot in her mouth and throat. She was so turned on she didn’t even have to squeeze down on the angry red bulge throbbing along with the rest of her cock as a fresh does of puppy-spunk was churned out and blasted down the surprised girl’s throat. Vera growled in delight as she began to feed her warm spunk to her little sis, gathering her wits only when little fists began to pound on her thighs.
She took that as a cue that Anna had taken all she could manage, so she pulled the girl’s head off her cock to give her some air. She bit her lip at the sight of her little sister flushed and gasping, muzzle still wide open and catching every rope of lupine cum that didn’t shoot over her cute face. By the time Vera was done the sweet fresh scent of a girl in her first heat was mingled with the sharp mush of lupine spunk and her little sister’s face was soaked. Practicality told the older wolfess she should help her clean up, but she just looked too cute panting with her face covered in cum and those big blue eyes looking up expectantly.
“And you call yourself a wolf? I told you to swallow everything, didn’t I?” Vera said, her tone carrying a lusty growl that the freshly painted pup confused for an angry one.
“I… I’m sorry. I tried but there was just…” Anna began but was cut off by the ‘wild’ lupine in front of her.
“Enough! There’s only one way for you to prove to me you’re really a wolf and not prey now…” Vera said, feeling her cock surge to life as her devious plan neared fruition. In one swoop she had her paws under the girl’s arms, hoisting her up easily and leaning her against a tree.
Resting the girl’s weight against the trunk, she moved one paw to her perky young rump and used the other to pull her left leg to the side. Vera saw the little girl freeze in fright and she supposed she must really looked like a hungry feral as she stared at the adorably innocent pink slit, showing just a hint of dew-sparkle to indicate that it was ready for a breeding even if the pup it belonged to wasn’t. The past few night spent under the same room with her fertile sibling had been restless, her dreams filled by visions of what was now a reality.
Later on Vera would regret not taking her time, having a little taste and drawing out the game of big bad wolf which she really was enjoying. She’d always loved spooking her little sister and making her squeak and squirm, which she suspected the pup was about to do. She still had no clue what was about to happen, judging by the frightened and confused way she stared at the glistening red cock as Vera did her best to maneuver it to the plump pink cunny without the use of her paws. She managed to let the cum-slicked length to rest on the girl’s mound, the soft and short hair that in the months to come would grow a cute little pubic tuft. From then on at was only a matter of sliding her tapered tip down, the hard, hot point brazing the little hood hiding Anna’s puppy-clit before it slipped into the plump young cleft under it.
The tip caught and when Vera gave a slight push, just enough to wedge herself securely between the smooth pubescent labia, she saw realization dawn in Anna’s blue eyes. The girl hadn’t even been considering the notion of that going there and the idea obviously scared her. And since Vera was of the opinion that her little sister looked her cutest when she was scared, it helped seal her fate. Vera had taken enough cherries to develop a technique, and in her opinion the faster it was done the better. Still holding her sister’s rump in one paw she let the girl drop down, her weight pushing her along the slick red shaft until more than half of it was embedded in her sex.
Anna’s squeak was short and sweet, the shock of actually having something go inside her overshadowing the pain of her hymen tearing as a fully-grown lupine cock punched through it. Vera didn’t have to fake a growl this time, a rumble sounding deep in her chest at the sensation of a fresh young cunny – heat swollen and slick- clenching up on her like the grip of a velvety fist. It was going to take some work to sheathe herself in that snug little honeypot, but the wolfess was going to enjoy every moment of it. And she was sure that Anna would get something she didn’t even realize she needed, even though it was obvious her little sister was still scared of the big bad wolf.
“What sort of noises are those? I thought you were a wolf and here you are mewling like a little kitten…” Vera asked, delight dripping from every word even though Anna hadn’t caught it.
“Please… take it out…” the pup whimpered, still shocked at the idea that something had been forced into her snug little slit. And when her teary eyes focused on the sight, the softly whimpering girl went mute as she stared at the hard red length of lupine meat and the plump pink folds splayed around it.
Drinking in the sight of her young sibling staring at her length, Vera let her bottom slip slowly but surely, using the girl’s weight to help sheathe herself deeper into the pup’s slick cunny. Anna just stared in shock as the scary-big lupine love-muscle slowly sank in, her budding and bared chest rising and falling as she fought to get her breath back. It made Vera remember her own defloration, which had admittedly been a bit more complex since she’d been staring at a cock going into her and her own length sliding out.
But Anna was a girl plain and simple, with nothing above her slit but the tinny puppy-slit now forced against the throbbing length her body was swallowing up. After another inch, the girl had started squirming in a futile attempt to get away, but with her back braced against the tree all her squirming accomplished was to slide her further down, inch by inch until her pink folds were kissing the big bad wolf’s big hard knot. Vera feasted her eyes on the sight of her baby sister panting and squeaking as the tip of the lupine cock tickled her cervix. The paw holding a handful of soft puppy-tush gave a squeeze and the hilted wolfess groaned in delight as Anna clamped down her already sung sex in response to the groping. She knew this was as far as gravity would take things, and that it would take some serious rutting on her part to tie with her little sis.
“Hold on tight and try to relax, puppy. This is where we find out if you’re really a wolf…” she husked into one brown ear, giving it a playful nibble before letting go of Anna’s rump.
On instinct the girl wrapped her legs around Vera’s hips and threw her arms around the older lupine’s neck, clinging to her disguised sibling even as the walls of her freshly speared sex clung to the red invader throbbing in her young body. Vera began to slowly pump her hips, still just grinding her knot against her sister’s glistening labia and picturing that slick pink kitty closing around the fat hard bulges at the base of her cock. She ran her hands up her sister’s sides, stopping at the girl’s chest. She could feel the heart beating wildly, part in fear and part in response to urges she knew Anna hadn’t been aware of until she found herself on the receiving end of a hot canine shaft. She ran her thumbs across the little patches of skin on each budding breast, murring in delight as the puppy’s little nipples stiffened under her paw-pads. These are going to look so cute when they swell up with milk… Vera mused, her cock twitching at the thought of what she was about to do to the girl.
The smell of her was driving her crazy, the sweet ripe fragrance that told her Anna would be walking away from here carrying her puppy. The thoughts took over her body, making her hips buck until she was doing more than just grinding her knot against the girl’s slit. Anna was bouncing now, squeaking as the motion of the lupine length brought on strange new feelings. She was still scared and anxious but it wasn’t the fear of being eaten. And she wasn’t begging the ‘big bad wolf’ to pull her thingy out. Some part of her seemed to know those pleas would fall on deaf ears.
Vera’s grunts and growls joined the squeaks and whimpers of the virgin bitch, her hips working hard to bounce Anna off her cock before she bucked against her trying to drive that swelling knot in. She knew it was only a matter of time, of that sweet young body stretching and yielding, the plump folds splaying a little farther every time she slammed against them. As the sounds coming from down there became wetter the noises the two sisters were making became less intelligible. 
With each forceful thrust Vera could feel her sister’s young sex stretch a little wider, the bruised pink folds a dripping mess now as a swelling knot battered into them over and over until one glorious thrust managed to push the whole thing in. S shrill cry was torn from Anna’s throat as she took her first knot, the walls of her cunny clamping down hard enough to make the disguised wolfess groan at the sensation.
“Owie! Pull it out, it hurts.” The panicky pup begged, sliding one littler paw down between them and looking shocked when her fingers brushed against the slick folds of her cunny, distended and stretched taut around the mass of masculine flesh swelling up behind them.
“It won’t come out until it’s done, so just be a brave little wolf and take it…” Vera growled lustily into one brown ear, feeling her sack pull up as her already big knot grew to its full size inside the girl.
“I… I feel… I don’t wanna…” Anna mumbled, the pain in her voice giving way to fear and confusion as the hard throbbing mass within her pressed hard against some very sensitive spots.
Vera was the first to cum, throwing her head back and fighting an urge to howl as her tip began to spray Anna’s fertile womb with rope after hot rope of virile lupine spunk. The sensation of something surging against her cervix was a strange new thing to the girl, drawing a gasp from the puppy with every pulse of her sister’s sperm into her young body. Vera was still riding her glorious high when Anna went over her arms going slack and her body falling back against the tree. Her legs were still locked around Vera’s hips, but with her leaning back the elder sister was treated to the sight of the girl’s body trembling, her chest rising and falling with each desperate gasp as her cunny began to pulse around the invading length, instinctively drawing the fresh lupine seed deeper in. 
The girl’s eyes were lidded and glassy, her hands rising slowly to press against Vera’s breasts. She wasn’t sure if her little sis was trying to push the big bad wolf away, or if she was actually trying to get a grope, but the sensation of the soft, tiny hands on her ripe mounds made the elder lupine thrust her chest out. She wasn’t sure how may climaxes Anna had ridden out, and a few times it looked like the panting pup had faded in and out of consciousness, even though her little paws kept instinctively kneeing the firm lupine mounds. Gushes of wolf-spunk told Vera that her knot was shrinking and that the knot was no longer enough to keep the deluge of puppy-milk in Anna’s quivering young body. The sharp scent of her cum mingled with the sweet smell of a fertile young slit stuffed for the first time, and with some whimpers and winces she managed to slip the knot out, holding her little sister’s hips as she watched her seed leek from her splayed, blushing folds and down to…
Fuck, look at that little thing wink! Vera thought to herself, biting her lip as the sight of her sister’s pucker twitching stopped her cock from sliding back into its sheath. She’s exhausted now, probably too tired to clench up…
The idea had taken root in the pervy girl’s mind, and a moment later the still woozy Anna found herself being hoisted up once again. The girl let out a soft squeak as Vera hooked her hands under her knees and lifted her easily, the pup’s head resting between her breasts as she carefully aimed her still slick shaft. Anna mumbled a few protests and slid her hands down to cover her creamy cunny, not even suspecting that the big bad wolf had something else in mind.
Vera knew she’d hit the right spot when she felt her little sis tense up, the pucker her tapered tip had kissed just a moment before clenching up as if she had any hope of keeping the lusty wolfess out. Leaning down Vera nuzzled the back of her sister’s neck before lightly nipping her scruff. This distracted the pup for one very vulnerable moment, and in the next the wolfess holding her bucked her hips and managed to force her cock into the little girl’s messy tail hole.
A shriek and a twitch was all the girl could manage, her head cradled between two firm lupine mounds as her little pucker burned from the sudden intrusion. Vera slid one arm around her sister’s waist, letting the girl’s legs dangle a foot off the ground now that she was several inches deep into the puppy’s tight little tush. Her free hand found the girl’s cunny, the plump young lips drooling the excess lupine spunk as the hard shaft slid deeper under the girl’s tail. Vera dipped a finger in, stirring the mess as she sought out her little sister’s sensitive spots, knowing that if she got her little cunny tingling she’d have an easier time rutting her rump.
And while it was obvious Anna didn’t like having her snug little ass invaded by a hard lupine length, the busier Vera got between her skinny thighs the needier her whimpers and whines sounded. Soon enough the wolfess had two fingers knuckle deep in the girl, the pups feet clad in their cute white stockings flopping back and forth as her rump was pumped. Tighter even than her formerly virginal slit, the sensation of a little girl’s little tush squeezing down on her was getting Vera riled up.
By the time she drove the helpless girl to a climax she was really rutting away at her, the pucker flexing and winking as the pup moaned her way weakly through a hard orgasm. Vera had honestly not been intending to knot the girl’s ass, but after the mad clenching was over Anna’s tail-hole was left either relaxed or exhausted, enough for the knot to push through on Vera’s next thrust. Folding her ears against the girl’s shriek, Vera pulled her hand from her sex and used it to close her sister’s muzzle shut.
“Just –ngh!- relax, you’ll be fine…” she murmured into one ear, but she doubted Anna had heard. Exhaustion took its toll on the girl and even though her eyes were still partially open Vera was sure her little sis was out of it.
Her fingers returned to the girl’s slit, a single digit pushing in and feeling the knot through the walls of her sex. Rubbing the pup’s sweet-spots now also meant rubbing her lodged knot, and in a matter of minutes Vera’s sack was twitching again, her hilted cock throbbing as she sent another load of puppy-batter surging under her little sister’s tail. After she was done she was starting to feel tired herself, so she carefully knelt down and cradled the groggy girl against her breast while they waited for the engorged bulge to shrink enough for her to try and break the tie.
*******
Anna was still sore when she came to, but to her relief the werewolf was gone. She made a face as she remembered the wild wolfess licking between her legs and under her tail, grossed out that someone would actually put their mouth in those places but happy to be relieved of most of the gross white goo, even though the bump in her belly told her there was still plenty left inside her. She carefully put her clothes back on and was relieved to find the basket she was brining to grandma untouched.
“Next time I’ll come here with my big sister. Then you’ll see!” she muttered to the empty woods before stoically waddling off…