With a disappointed pout, Synthia paced the living room of her sprawling mansion, wondering if her internet advertisement had been perhaps too blunt, too kinky, too...blunt.  She did have a habit of saying things without censoring them for those less-inclined to be interested in her bizarre talents.

"Single hybrid female seeks partner for wild romp, no limits, massive gaping/penetration preferred and expected.  Must like cocks over a foot.  No single dudes (unless you're absolutely giant)."

Of course it was dictated by her to her personal assistant, because she couldn't spell to save her filthy soul, and the message was promptly followed by a deluge of obligatory dick portraits, and one poor fellow who interpreted the line about "cocks over a foot" as an invitation to engaging in foot fetishry.  She turned off the computer angrily, storming back into the living room in a huff.  "Grrr, people are like, so dumb, you know?" she boomed in her valley-girl tone, breasts threatening to escape her pitifully small tube top at any moment.  "They don't know what I want!"  Her long-suffering assistant only nodded, afraid to say the wrong thing to Ms. Vice, whom most of the staff referred to as "The Hybrid Volcano", both for her ability to ejaculate and destroy entire pieces of architecture, as well as explode emotionally over the stupidest and tiniest things in life.  "Just once I'd like to- " Before she could take out her rage on the furnishings, she was abruptly cut off by the ringing of the doorbell, to which her cat ears perked up and immediately turned her head in the direction of.  "Oh dude, I think that's the one!  Her picture was like, so sexy," she cooed, remembering the few images that had been emailed to her.  She appeared to be an anthro of some sort, also.  Whether she was already that way, or a genetically-altered freak like Synthia herself, she didn't know, or care.  She just knew that pussy that was attached looked tight and very inviting, as did the animal-like nipples in triplicate pairs running down the girl's torso, the uppermost ones being attached to a delicious pair of small breasts.  "I'm gonna fucking WRECK this cunt," she bragged, striding confidently to the door, which she deftly opened with a flick of her wrist in expectation of her new partner.

Standing in the doorway looking into the night, she saw there was nothing there.  She stared blankly straight ahead, her expression immediately souring.  "What the fuck?" she roared angrily.  "Down here," said a cute voice from below her gaze, and she turned her head downward to see a small creature with large ears, canine features and a head of red hair to which clung two long ponytails on either side. The figure stood about four feet tall, and perfectly resembled the one from the pictures.  She smiled slyly, extending a hand politely.  "Hi, I'm Sherly." Synthia's eyes narrowed, studying the shorter figure from head to toe.  "I was expecting someone...bigger," she rasped, taking out an imaginary tape measure and pretending to measure her own height compared to Sherly.  Syn herself was about five-foot-eight, but with wearing heels like she usually did, she was close to six feet.  Sherly looked at her feet, which were bare except for a pair of baggy socks covering her calves, wriggling her anthropomorphic toes nervously.  "Sorry, the pictures make me look a lot bigger."  Her shoulders sagging, Synthia stood abreast of the threshold, waving her arm as an invitation to enter.  "Well you like, came all the way here, so let's get this over with."  Sherly padded softly inside, gazing with wonder at the ritzy abode, filled with tacky 80's furniture and awkwardly sexually explicit art of various kinds in plain sight.  She didn't seem fazed by any of it, and Synthia had an inkling in her pea-sized grey matter that this Sherly might perhaps be some kind of kinkster.  "Bedroom's up here," barked Synthia, placing her hand on Sherly's meek little head and turning her towards the grandiose staircase that led upstairs.

As they approached the top, Synthia spun around and pointed an accusatory finger at Sherly, who immediately froze and covered her mouth and gave a start.  "This isn't some fuckin' underage sex sting is it?" she spat, wagging that finger an inch from the shorter girl's nose.  "They tried to pull that shit on me once already.  I'm not that much of a perv!"  Turning to the side, she added in a whisper meant for herself, "Age of consent is just fine though, heheh."  Sherly blushed and shook her head quickly side to side.  "N-no, no! It's not like that!  I just answered the ad!"  Her tiny hand drifted between her legs, rubbing furiously between her legs against the fabric of her barely-there khaki shorts.  "I'm just so horny...there's nobody out there who can satisfy me."  Synthia rolled her eyes.  "I'd fucking split you in half, dude," she said with a sigh, turning from Sherly, who spied the bulge hiding between Syn's legs.  "I wanna see!" she squealed, running up to her, throwing her hands under Synthia and yanking down her special underwear, meant to keep her considerable junk tucked up into place.  "Hey! Hands off fucker!" she shrieked, head craning over her shoulder to catch the look of astonishment on Sherly's child-like face.  If it hadn't been for the fact her tongue was attached to the inside of her mouth, it likely would have been somewhere around her ankles, as it hung out of her lips, a tiny trickle of drool escaping the tip and spattering onto the hardwood floor.  "Wow," she whispered.  "It's even better than the picture..."  Synthia waved her hand dismissively, grabbing Sherly by the nape of her neck and picking her up effortlessly.  Being genetically-modified had its advantages.  How else would she be able to wrestle herself around on the giant, muscular guys she often enjoyed if she wasn't inhumanly strong too?  "Yeah, yeah, it's sooo wonderful.  Just wait until I pump it up some, then we'll see what you think."

The door to Syn's bedroom was thrown open, and Sherly was tossed headlong onto the gigantic heart-shaped bed in the center.  "You might wanna know, I fucking hate foreplay," she growled, whipping off her flimsy spaghetti-strap top (Hell would freeze over if she ever wore a bra), and shrugged off her mini-mini skirt, which barely covered anything anyways, seeing as how her foot-long member was already dangling free between her thighs.  Sherly's ears perked up, and she grinned eagerly.  "It pumps up?" she asked in a tone tinged with wonder.  Synthia laughed out loud, her titanic mammaries bouncing up and down, piercings jingling.  "You could say that. Remember a few months back when the red light district here in Los Agujeros was nearly swept off the face of the map by a giant deluge of cum?"  Sherly nodded, recalling to herself with a blush that she'd gone out to play in it, and even took some of it home with her for...personal use.  Synthia jammed her thumb at herself.  "That was me.  I was like, sooo horny that day." Immediately, tiny Sherly was clawing at Syn's feline cock, rubbing her face tenderly into the already-stiff barbs coming from the end of the shaft.  "Please do me," she said into that piece of pornstar fuckmeat, and no sooner had she said it, than Synthia had the baseball-sized head in Sherly's waiting mouth.  "This is for starters," she said softly, pushing against the back of Sherly's head to see how much she would take.  Syn became harder once she realized the girl wasn't stopping her, not even gagging a little.  Sherly's jaw seemed to almost dislocate, looking almost like a constrictor snake as it stretched around Syn's five-inch girth.  Soon enough, she was pushing up on the back of her throat, with a few inches to spare.  Sherly grunted, her hands gripping Synthia's huge, juicy butt, and pulling her deeper inside.  She felt her dick follow the bend in Sherly's gullet, and instictively began to thrust, listening to the sound of the girl's  passage wrapping snugly around her shaft..  "Choke on it, choke on my fuckin' dick," she growled, hammering on the poor girl's esophagus. Sherly only smiled around the meat filling her mouth, closing her eyes as she took the remaining length without so much as flinching.  Synthia smiled back, one filled with intent and tinged with malice.  "I said I was gonna wreck this cunt, and that's exactly what I'm gonna do!"

Syn grabbed Sherly by the hair, lifting her up from the floor, cock still wedged down inside her tiny body, and carried her over to one side, near the grandiose pink vanity strewn with sex toys and various instruments of dubious purpose.  "Let's see how you do when it's fuckin' supersized, bitch," she cooed, rummaging through her collection until she extracted a palm-sized injector, and several small vials of different coloured liquids.  Paying no attention to the warning labels (as if she ever did, or had the brain cells or sense left to), Synthia immediately slapped the first one into the rear of the pistol-shaped device, and pressed it up against one of the veins on her shaft visible where it snaked into Sherly's suckling maw.  "There's one," Syn whispered, nearly dropping the injector onto the floor as her eyes rolled up into her head with pleasure.  "Oh fuck, there's something I haven't felt in a while."  Immediately, her shaft began to widen noticably, and she could feel it lengthen also, pushing further into Sherly's insides.  Synthia saw the girl's expression take one of shock for a moment as she felt the member grow inside her, but it quickly softened as she became accustomed to it.  Synthia was not amused.  "Oh yeah?  Have another then!" she said angrily, throwing the empty vial onto the floor out of the injector and promptly slapping another inside.  Was the maximum dosage three or four?  She couldn't remember, and frankly didn't care much as she shot herself with the second one.  She would use as many as it took, of all kinds, enough to completely DESTROY this girl, leave her a cum-filled, bloated, distended mess.  Syn's cock began growing again, Sherly emitting a tiny murmur as she stretched to accommodate it, smiling around it even still.  The pink hybrid was furious.  "I'm gonna fucking run you right through!" she shrieked, grabbing a huge handful of vials, not even looking at what they were, and in the space of less than a minute, she shot one after the other, the empty ones forming a small hill by her feet.  Syn convulsed a bit, dark spots coming into the sides of her vision, but her determination kept her from blacking out.  "Here we go, bitch," she growled, reaching down to grab Sherly's legs before she was unable.  "Enjoy the ride!"

Holding Sherly's legs apart dangling her body in front of her, Synthia let out a moan that echoed throughout the house, perhaps even the neighbourhood as she grew.  She could feel herself snaking through Sherly's insides, which seemed like merely a flesh sleeve as she felt air running across the head of her dick, and she knew she had gone through and through, looking down at Sherly's face between her enormous expanding breasts, contorted with bizarre emotions she couldn't comprehend in such a state.  "Having fun yet?" Synthia snorted, wrapping her fingers around one of Sherly's ankles and wrists in each hand, steadying herself as she began to thrust through the cocksleeve that had been, moments earlier, a cute anthropomorphic girl. Sherly's eyes, which had been frantically looking in all directions, now slowly rolled up into her head, orgasm after orgasm rolling over her tiny body as she excreted juices copiously from her lilliputian girlparts. Synthia slapped Sherly gently across both cheeks, lifting up one of her eyelids with her thumbs to see if the girl was still conscious.  "Don't fucking pass out on me yet, I haven't even cum!" she snarled, letting go of Sherly, and with a firm whip of her cock, flung the semen-soaked cockrag off her shaft and onto the bed in the center of the room.  "You're getting loose too fast," Syn snorted, striding over to the vanity again, her meat resting on her shoulder.  "I need to spruce things up a little, I think another dick will do the trick just fine."  Inserting another vial into the injector unit, a green one this time, she pushed aside her throbbing shaft, and plunged the tip of the injector directly into her swollen clitoris, which immediately began to lengthen, rapidly forming itself into a serviceable phallus.  "Now where were we?" Synthia mused, a finger to her chin as she grabbed Sherly's rump, and immediately speared her cock up her gaping ass, where it easily went through her torso and back out her mouth in reverse.  Before it became too large to enter, Synthia jammed her expanding clit into Sherly's pussy, which was so small as to be almost unnoticable.  "This tiny little thing is due for an overhaul...or should I say demolition?"

Sherly barely winced as Syn began thrusting again, but the bed started to protest the rapidly increasing weight placed atop it, groans emitting from the frame below, already weakened considerably from previous sexual escapades.  She held Sherly firmly by the hair, the tiny girl's arms hanging limply on either side of her, although she did appear to be enjoying it, even though she bordered on unconsciousness from sheer ecstacy.  By this time, Synthia was so aroused from seeing Sherly wrapped around her pair of fucksticks like a Japanese "onahole", that she was quickly reaching climax, much faster than usual.  "I'll be sure to pull back into your belly and push into your fuckin' womb when I cum, so you fill right up to the brim," Synthia grunted, Sherly's rear slapping against her groin.  She paused to take some pictures with her cellphone, which she had found in the bedsheets under herself, and which was barely functional due to its many encounters with seas of various bodily fluids. She snapped some particularly good ones, making sure to get a few from the side to capture the delightfully glazed look on Sherly's face as she was stretched to oblivion, as well as a couple from underneath to show her hideously bulging stomach, which seemed as if it would burst with every thrust.
Synthia herself was staring to get that glazed gaze as well, tongue flopping out of her mouth as her hips took control of pounding Sherly, her brain beginning to come close to blackout from sensory overload, nanites firing rapidly as they tried to expand her capacity to process it.  "Cummin'...I'm...c-...cummin'," Synthia slurred, grinning dumbly as she began spurting her load, the sound of it gurgling in Sherly's innards filling the room.  Like she promised, Syn pulled back into the girl's belly, pressing deep into her womb as she came.  

In a matter of seconds, Sherly began to bulge, slowly at first, but the pace rapidly increased, her midsection swelling outward as both of her holes were stuffed full.  The sound of liquid sloshing in her aroused Synthia even more, setting off another wave of orgasms, that served only to make her poor little partner expand even more.  Sherly at this point looked as if she should have burst, but her spherical tummy kept going, now beyond five feet in diameter. "Cum...cum...cum..." Synthia panted, pounding away erratically at Sherly's holes until her body finally gave out, and she fell backward.  The sheer volume of semen inside Sherly caused her to pop off the cocks inside her, the thick fluid propelling her right off them, and into a sticky heap on the floor before the bed.  Syn rolled back and forth in total bliss, slowly regaining her senses as she sat upright, pushing her bloated breasts and cocks out of her sight.  In front of her stood Sherly, grinning and rubbing her distended stomach, which brushed the floor at her feet.  "Gee, that was good," she squeaked, patting the flesh as it rippled and churned.  "Can we go again?" Synthia looked at her with a fiendish smile, grabbing another handful of vials off the sheets beside her, holding them in outstretched palms so Sherly could see the selection.  "Certainly...lemme just add some more cocks."