Payback

*A woman betrayed on her first date finds a way to pay back the favor after an experiment gone "right". Written around 2022.*

"Hold still, now. Hold still!"

Aylah had awoken on a hard metal table with a bright white light above her, the dark faces of several people peering over her and holding her in place. She screamed and thrashed as they held her arms and legs, but it was to no avail. She saw the silhouette of a syringe outlined above her, in the hands of one of her captors, and she screamed again.

Someone held her head as she began to thrash again, pushing her head against the table and pulling it to reveal one side of her neck. The syringe lowered, the captor's fingers tensed in preparation for squeezing, and a moment later she felt the prick of cold metal and a sharp, hot pain in her neck. Immediately, she felt her voice leave her, and the sensation of hot liquid running through her veins from the point of puncture raced through her.

"All right, she's done," a low, sterile voice said as her body stiffened at the feeling running though her. "Put her in the cell and keep a guard on her until physical changes begin."

Hands gripped Aylah tightly and lifted, and she was carried easily off the table, through a metal door and dropped on a thin mattress on the ground. The door slammed behind her. Her hands were clenched into fists. A nearly painful heat was racing through her body, up and down her limbs, making her head tingle and her stomach grumble. She was panting, rubbing her head against the mattress listlessly, trying to imagine herself feeling normal, cool, and somewhere else.

"Help," she grunted in a croaking voice, finally lifting her head and watching through swimming vision as a man in some kind of security uniform scoffed at her from a chair in the corner of the cell. She tried weakly to pull herself toward him, but didn't manage more than an inch or two.

"No one's coming to help you, Missy," the guard sneered, "so I wouldn't waste your breath."

"Why?" she asked in nearly a whisper. She could feel a cold sweat covering her body, her skin breaking out in goosebumps.

"Why? Easy target."

Aylah groaned and curled into a ball. Her back ached. Her face ached, even her fingers ached. She felt feverish and confused, and was having trouble remembering what she had been doing before she woke up there. Her arms were wrapped around her chest, and she sneezed. "Wal... king," she slurred, her tongue feeling thick. Her skin was beginning to tingle, spreading from where she had been injected with an unknown substance. "Walk... forest... date."

"Yeah," the guard laughed from his post. "So easy to get you into a forest alone."

Aylah sneezed again, a pressure growing in her sinuses. On the tip of her nose, tiny black pebbling rose from her skin, barely noticeable as anything other than blackheads. She ground her teeth together, feeling aching in her gums and her jaw, and whimpered as a shooting pain ran down her spine. Her legs jerked at the feeling, and as she hugged herself tighter, a bone pushed up against her skin from the end of her tailbone.

"What is..." she gasped, "wrong with..."

"I wouldn't worry about it too much. You won't care in a few hours."

She felt her throat clench closed for a moment, and gagged and coughed until her airways opened again, her vocal chords reconstructing as her whimpers and groans began to sound less and less human. Her entire body was on fire, and it was beginning to focus in her lower belly and between her legs. She gasped as a particularly strong pang shot through her pussy and caused her to clench her interior once, her legs quivering. Beneath her skin, fat deposits began to form in her legs and ass, melting away her strong, chiseled muscles for a softer form. The feeling was electric, sending signals between her legs as her sensitivity on her lower body increased. Aylah whined twisting her legs around on the mattress as blood rushed to her engorging clitoris. The pink of her smooth lips was slowly taken over by black, her pussy reshaping and growing. Bones creaked and she screamed at the pain behind the twinges of pleasure shooting into her core.

The bone pushing against the small of her pack wiggled, growing in size, and gradually pushed out underneath her underwear, which was the only piece of clothing left on her. Aylah whimpered as the skin stretched around the growing bones, extending her tailbone to nearly an inch. Around her new tail, soft, chocolaty brown hairs began to grow out of her skin, blanketing the small of her back with a thick patch of new fur. The feeling of the fur rubbing against her underwear as she thrashed made her skin tingle and bubble. Her ass grew, stretching against the underwear and pulling it tight against her new ass.

The guard, armed with a single pistol in his holster as he relaxed in his metal chair, chuckled to himself as he watched the woman whimper and curl into a ball before him. He could feel his cock twitch at the knowledge of what she was to become within a few hours, and thought seriously about jacking off right there. "Just keep that up, darling," he muttered, pressing at the feeling in his penis, as she let out something between a whimper and a bark. He sat back in the chair, relaxed, and raised his arms behind his head. "You'll be loving it in no time."

Aylah's pussy was black and swollen, and begging for something inside of it. She could feel her muscles clenching at nothing, wanting. She rolled her eyes and bit the edge of the mattress, desperately trying to resist touching herself. Between her lips she could feel how slippery she was, how her thick cum was leaking through into her underwear and how musty she smelled. Her nostrils flared, pushing out slightly, and the thick smell of her pussy sent her reeling back against the mattress again.

"I--" she managed, before her failing voice fell back into whimpers and moans. Her tail was nearly two inches long, and pressing tightly, painfully, against her underwear. It was nearly completely covered in brown fur, trapping heat and moisture, and the hair was spreading down her asscheeks and around her pussy.

Pressure built under her fingernails, and a moment later they bulged. She whined as they split, bloodless, and new sharp claws grew in their place. The pads of her hands were blistering, the skin beneath them hardening until they were leathery. The same thing happened in her feet, until she was fully clawed on all four limbs. She thrashed and bit at her mattress again, pulling at it but failing to tear it. Her tongue was heavy in her mouth, and the more she chewed at the mattress, the less room she had in her mouth. Her tongue grew until it overflowed from her jaws, flaring at the tip and flattening, dripping saliva onto the concrete floor.

More popping in her spine and her tail grew another two inches, forced down around her asscheeks. Brown hairs became visible above the band of her panties, spreading first in a line up her back. She pulled herself up on all fours, the feeling of her swollen pussy pushing her legs slightly further apart. She was dripping down there, and she needed more than just to touch it. She felt so good down there, and so empty. She needed to be filled.

She snapped her jaw and yelped as her molars cracked against each other, crunching and dropping away as new, sharper teeth, pushed forward from beneath them. The bones in her face creaked and groaned, and Aylah whimpered again as her face pulled forward slightly, giving more room to her panting tongue. Her nose was completely black and pebbly, and it twitched as her sinuses opened and a host of new smells entered her nose.

As her A cup breasts hung beneath her, fat deposits formed in them, and they swelled quickly, suddenly heavier and barely small enough to cup in an average man's hands. Aylah pushed her lower body against the ground, dragging her erect nipples against the rough mattress and moaning as the sensation sent electricity to her pussy. Her jaw pushed forward again, beginning to look more like a muzzle, and her nose began to round out around the point. Her lip split, running up her upper lip until it reached her nose, and she bared her lips briefly to show her sharp teeth.

She needed cock. Something in the back of her head told her that was wrong, but those thoughts were quickly fading into echoes, replaced by the need to breed, the need to be filled. Her ears seemed to fill with cotton for a moment and she shook her head. They came to a point and then the thin cartilage grew, until they flopped over on the side of her head. With a screeching deep in her head, her ears moved up the side of her head. She rolled on the ground, trying to get rid of the sound, until her floppy ears came to a stop further up her head and a pop released a clear barrage of sound.

Aylah barked and sat, her fattening ass padding her as she plopped it on the ground. Her tail had grown to about seven inches, completely covered in fur, and began to move of its own accord as she learned how to control it. It wagged in her seat and she moaned as her pussy changed again, moving up the back of her to rest just beneath her tail. She pressed her ass into the ground and snapped her jaw at the pressure on her cunt, sending tingles to every extremity of her body.

Then she heard a snore, and her head snapped up. She saw with clear brown eyes the figure of the guard, limp in his chair as he napped on the clock. She cocked her head, sensing something about him that she needed. Her eyes were drawn between his legs, to the mass there, and she knew it was something that could fill her. She could smell it, and she whined at the prospect. In another moment she had pushed off on swollen thighs and was bounding toward the corner of the cell. She barked and made to leap onto him when his eyes opened suddenly and he screamed.

The guard reached for his gun, but he had barely moved when Aylah's body made contact with him. "Need, need," she grunted, her voice barely understandable. She pulled him down to the ground with claws on shortened fingers, and he fell hard against the concrete. His gun came out of its holster and bounced across the cell, landing in the far corner. Aylah paid it no mind, snuffling at his crotch and barking when she felt his cock hardening under her worrying. She whined at pawed at his pants, growling at him when he made to push her off.

"He--help!" he cried, unable to say much more. "Help! She's--she's changing! She--" Aylah pressed her muzzle against the guard's throat and shoved her tongue into his throat. He gagged and coughed, and Aylah set herself to licking around his mouth as he struggled. Something in her told her that was right, that that part came first. Then, having finished with that task, she sat down on his crotch and pressed her dripping, trembling pussy against his cock beneath his pants.

The guard grunted, his cock hard against her lips. Aylah dug her nails into his chest and used her other paw to tear his pants down. His cock slipped free of his boxers and Aylah yelped in excitement, pressing her cunt against it and moaning. Milk ducts formed in her breasts, and they swelled again, and a single drop of milky-clear liquid dripped from her nipple and fell into the guard's mouth.

The warm liquid tingled on his tongue, and the tingling spread, and as Aylah busied herself with figuring out what to do with his cock, he began to yell. "Help! God, help me someone! She's changing too fast and I'm--ah!" He yelped as he felt a warm, wet tongue gripping his member. His legs jerked, and the sensations he felt were conflicted and confused. Her tongue gripped him, the width and length of a dog's tongue with the muscular strength of a human. Her muzzle engulfed his cock, and he couldn't help himself from moaning. He had never felt anything so wonderful as the way she sucked his cock.

Distantly, he heard a single shout, but his gasps and twisting beneath Aylah left him speechless. More milk dripped from her breasts, falling in warm drops against his legs. His entire mouth was tingling and warm, and his tongue felt heavy in his mouth. He was panting, beginning to rock his hips as Aylah's tongue moved up and down against his length. She sucked and slobbered around him, and as she did, his cock grew in her mouth. His tip faded into itself, the skin smooth and pointed at the end. The nerves in his cock were on fire, and he grunted as he came close to orgasm.

"Stop," he moaned, at once wanting to stop her from continuing and wanting nothing more than to fuck her pussy himself. His teeth cracked in his mouth and filled with the sharp ones he would need, his tongue hanging lazily from his mouth. He looked at Aylah as she lifted her head to look at him. Her ears were large and floppy, completely covered in chocolate brown fur to match her hair, and several whiskers had pierced through her skin. He reached up and gripped her body, feeling his numb hands running through thick fur on her sides. Aylah whined and moved her pussy back over his erect cock.

With sudden heat rushing through his body, the guard grasped Aylah's body tightly and slammed her around into the ground, flipping her onto her stomach and situating himself over her. His ears twitched as he heard shouts from behind the cell door, but he did not take notice. "Mine," he grunted into Aylah's ear, and she whined in submission, presenting herself to him with a raised tail. Her furred ass was thick, her hind legs bulging with new fat and shifting bones. The guard dug his fingers into her fur and slowly pressed his swollen cock into her cunt.

Aylah barked, her depths slowly filled with a cock that was all hers. The heat in her stomach burned, her entire body electric. Her stubby fingers pawed against the ground, the pads underneath growing thicker until her stiff fingers were barely workable and hardly recognizable as human. The guard pressed his full length into her, stretching her painfully, the pleasure overtaking any discomfort. She whined, pushing against him to feel his swollen balls against her ass. Bones popped in her legs and gradually, her knees rounded and lifted from the ground, forming hind legs that could more comfortably stand on all fours. Her breasts shook beneath her as the guard pulled out quickly and then pounded violently into her. Aylah yelped, taken by surprise, but her pussy clenched against his cock once and she arched her back. On her stomach, four tender pink spots formed, some of the only skin not covered in thickening fur. The spots split into four, tiny nipples rising from the skin, and they swelled quickly into four small round teats, bouncing along with her heavy breasts. Aylah felt a flush of heat rush through her as her teats dripped milk for the first time, and she pictured a future of puppies and domestic life.

The guard began a steady rhythm pumping in and out of her. His hips gained muscle beneath his clothes and eventually sharp nails dug into Aylah's hindquarters. There was pounding on the metal door. Only the guard had the key needed to get in or out. More muscle grew beneath his shoulders and in his chest, and he growled as his cock spasmed once and he nearly came. Curly blond hair sprouted along his neck and spread across the back of his shoulders, trapping heat with it. His nose twitched, turned black, and pushed back into itself. His vocal cords cracked and bent into new shapes, and he barked. Aylah whined beneath him, and he thrust in and out of her even faster.

He heard heavier pounding at the door and knew he had to work faster. His eyes rolled back in his head as his ears flopped and rose on his head, covered in the same curly fur. He barked and whined, feeling his cock beginning to swell. Aylah tensed beneath him, and as she squeezed his cock he howled and exploded inside of her, his seed flowing into her as he lost control and fell backward. His swollen cock pulled out of her with a pop and the two cried, Aylah's pussy clenching nothing as he exited her, still cumming. She gripped tightly with every clench, desperately holding onto his seed and willing it further into her. Her body quivered with aftershocks, her vision swimming between black and vibrant colors. Then she collapsed onto her side with a huff and let the feeling of pure pleasure overtake her.

As he fell onto his back, the guard felt his cum spray up and land over his half-furred body. Without thinking, he began to lick himself, the salty taste of his seed washing easily down his throat. His cock was still hard, and he whined as he prodded at it with stiff fingers. Managing to wrap his hands around his member, he began to rub up and down, far from satisfied. The sound of the metal door being thrown open by force sounded behind him, but he did not care. Shouts rang out around him, but he cared only about the pleasure he could get.

He thrust his hips up from the ground as he rubbed himself, feeling tingling and heat in his stomach growing every time he did so. His hand gradually moved less and less, and he did not even notice as his cock began to shrink in size and girth. The nerves beneath his skin multiplied, and he gasped and whined at the sensation. His pumping movement grew faster, eventually morphing into a massaging of an organ that just stuck out from his body. He gasped and flushed as his balls pulled up into his body and formed into ovaries. Female organs formed inside him, pressing against skin that separated them from the air between his legs. He ran his other hand up his sensitive chest, whimpering as his nipples grew erect and lightened to a delicate pink.

The guard yawned, his jaw pushing forward slightly less than Aylah's. It was quickly engulfed with curly yellow fur, damp with his saliva. His ears flopped open against the concrete. On the small of his back, a bone unfused from his tailbone and pushed outward, pressing uncomfortably against the floor. He shifted as he rocked his hips, letting his tail move freely and curve around widening hips. He was close, but there was something stopping him, and he didn't know what. His legs stretched and his toes shrank, forming themselves into paws and hips that could no longer stand on their own. He felt a hand grab him and instinctively bit it, drawing blood. The hand pulled quickly away with a choir of shouts, and the guard rubbed harder at his minuscule cock. With a shifting between his legs, he whined and parked as a slit opened up, revealing slick lips and a depth that suddenly needed to be filled. His shrunken cock shrank further, stopping when it was just a long, swollen clitoris that peeked out from between his lips.

The guard moaned and shoved her hand into her cunt, reveling in the sensations pricking her body. She thrashed beneath her hand, rubbing her nipples, and pinched them as deposits of fat formed beneath them. Her breasts grew, small but sensitive, and she moved next to the growing sensation low on her stomach. She pulled and massaged the tender area, and her teats grew quickly, forming milk ducts before her nipples were even ready to give milk. They swelled, cupped in her hand, and she squeezed sweet milk from them as a pressure built in her lower stomach.

Her hands worked furiously, rubbing and pushing and squeezing, and her hips began to move erratically as she began to lose control. With a yelp and a bark, the pressure in her exploded, milk pouring from her breasts and teats, her pussy spraying cum and quivering, rolling with pleasure as she let her tired muscles fall limp and jerked with aftershocks. As her pussy clenched, still empty, she rolled over and gazed at Aylah. She was asleep, the door to the cell open behind her. The guard considered laying down beside Aylah, but the heat in her stomach began again, and she knew she had work to do.