Lisa licked her lips twice, looking up and down between Eric's crotch and his face, multiple times, finally breaking the silence with a croaky, "like, I'd just be fully a rat." He nodded. "Just an animal, getting bred by TomTom all the time?" She asked.
"Yeah, just making little ratings forever. Might size you up to fuck you occasionally". Eric conceded.
Another pause descended as Lisa looked over her pink body, then stood and walked over to him. She closed the distance and straddled his lap, both cocks pointing up at her.
She reached out and gently grabbed the human cock, disappointing Eric. "Either a sexy little rat mutant, or a dumb animal good for nothing but breeding. That's not really a fair deal is it Eric?". She met his gaze till he relented and shook his head. "Yeah, it was never a choice..." She pushed the human cock against his stomach, out of the way, so that she could sink slowly onto the pointy rat cock instead with a happy sigh.
As soon as she did the unstable change of the Chronivac began to fall apart and she started to revert. First nipples began to sprout from her chest and she let out an incredibly satisfied moan, "that's better!" She gasped, arching her chest. "Bye bye stupid human body!" She cackled manically as she lifted and then slammed back down onto Eric's ratty cock. "I was ohhhh-hhnnnn-yeah!!!" She exuberantly called as he felt her scaly tail burst from her spine and snake down his leg.
Now frantic she began bouncing up and down at pace, wetly slapping on his lap. "Ahnggh.... Good thing you're finally just go-oohhh, yeah!!! Go fuck me into a full raaawttt!" She moaned. "Need all that batter!!!" She pawed at his balls as her nails turned black and rough. "Glaaad, you get chance to do, not some ba-baaahhh". Her eyes began to bulge and separate as she grinned a dementedly happy grin. "-baahk alley rawt... They don't make enuf cumm to change fast. Take too long for Rat!"
Eric stopped thrusting for a moment, pausing the bouncing Lisa, as she lolled around, revelling in her body turning back to its Rat form. "Wait" he said, "you fucked some wild rats!?"
A wicked grin split her face, buck teeth prominently sticking out as she drooled. "Nyyeah!!! Hehehe! When you stopped changing Rat, started find more good cum in alley at night." She began wriggling on him as her feet extended with satisfying cracks. "Not enuf cum for fast make Rat... Too small rats, cocks no good yet for fun. But want more Raahht so go often at night." She gave a deviously proud look at that brooked no mistaking she felt only pride in her actions.
Eric was surprised how much the thought of the once woman sneaking out at night, fucking rats for miniscule dribbles of cum just to turn more animalistic, turned him on. "God you're nothing but a dirty, filthy Rat" he accused. She cackled, feet soles growing padded. "Yes-yes!!! Am Rawt. Tell you allhhhnnnghh." Her face began to crack and push into a pink naked muzzle. "Aahhnmhh. Tell all time am Rawt. Not hear-listen to Rhhhat!"
With her revelation, and the revelation of how he felt an idea built in him.
"So you cheated on me you filthy Rat" he started with mock outrage. She just cackled in response. "Hehefefefee! You biggest, bestest ratcock, but no changink Rahht. More rattink importanter to Rwrahht! Maybe make now a full Rwat for punish yesh-yesh!?" She looked eagerly up at him.
Instead he pulled his Rat cock fully out of her and held the human one with a grip and growled. "Maybe I should punish you by going back to this and preventing you going any further!?"
Rats face went from smug proudness to panicked horror in a split second. "No-noooo!!!", she wailed. "No-no make person! Rwat sorree. Rahht just want finish change!". Rat began to squirm, feebly trying to get away from Eric's human cock. "Oh, maybe I'll change you back to fully human every morning, make you go to school, and get a job! That's what you'll get for going to other Rat cocks!". Rat screamed and wailed now, having a tantrum, drooling wildly from her stretching muzzle, "Naht fair!!! Naht when rat-self so close!!! It just rahtfucks. Nat peeplefucks!!! You can fuck other peeples so Raht can fuchk hunky rats yesh-yesh?". Eric had a wicked response with, "oh they're 'hunky' now too eh!?".
Rat *eep'd* in response. And began to half sob, "No punish Raahht!!! All Rats hunky, smell-good!!! Can't help-want! Why no you fuck peeples too!? Fuck Raht-sister??? She heat for you too. Raht smell!!!" She tapped her nose. Eric loomed over, still rock hard at how pathetic and mangled this things brain was now.
"Tell you what, how about this then! I'm going to use this" he grabbed his rat cock, "to drown you in cum for the next few hours. Then, when you're small enough I'll call in the neighbourhood 'hunky' Rats to run a train on you. To finish you off!"
He saw confusion, and delight pass over her face, there were moments where it looked like she tried to pretend to be horrified, but in the end she just churned excitedly.
"Yeshyesh! Punish with best cock and hunkys finish make Rahhtbody!!!". She swung open her furry legs again to give Eric full access to that plan. He wasted no time. The mock incredulity of listening to her explain her animalistic infidelity finished with. He didn't care, it was rattish and depraved, therefore it turned him on.
Mutating paws grabbed his shoulders as he watched her nipples bulge into black teats, sagging obscenely. She leaned in, drooling and licking his chest. "Make Raahht of me... No want to be person!!". He felt the dusting of growing whiskers tickle his chest. "Person body uhhnggly. Raahhwt body best!!! Feel gooder. Feel... Uuuhnngghh..." Her eyes bugged again as her head hair trailed down her back, starting to cover her in fur. But that wasn't what was setting her off. Like a vice he felt her pussy morph into its rat shape, lip muscles strengthening and gripping his cock tightly. "Yeshh! Yesh, yesh." She wriggled excitedly. Footpaws on furring legs tightly clamping on his waist. With a sound almost like an inflating balloon, her Rat labia began to swell as her body flooded with heat hormones.
"Yesh... Make brood kween! Nnyaach! Fill-fill wif ratlings." Fur wrapped fully around her muzzle and began trailing down her chest as her tail twirled around his leg, anchoring herself further on his leg.
"Make Rat! Fill wif ratlings. Yesh-yesh... Peeeple think go, rat tingk now!". Her head stretched with a shake, face and neck fully rattified back to where she was that morning. She was almost fully back to her true form, only a few pink patches left.
Eric picked up the pace eager now to get going proper. He built a rhythm as the last of the fur rolled over the once person, squeaking with less and less coherency."
"Rraaahht. Brreeeed!!! Preeteeee"". It squealed happily, regaining its form, one hand mashing at its vile pussy, the other helping her muzzle suckle on her own saggy duds.
The main show was here, he could feel Rat contracting its vaginal muscles to hold on to his rat cock with all the strength it had. The vice like grip quickly drove him to the edge, and with a grunt he started cumming.
"Here we go you disgusting Rat" Eric panted, between deep squelching thrusts. "Fill, hnngh you up and watch you turn into a dumb animal!" He grunted, rope after rope of cum filling Rat while it squealed, "Yeshh!!!! Finishhh, Rwwraattt! Brreeeed". Paws flying all over its furry body and dusting everything in it pheromones, Rat writhed in chittering delight.
"Hnnnghh.... Kept.. ahhh. Cum flow. Huff... Going" Eric puffed, as he continued to shoot into the short Rat mutant. Explaining why his orgasm was drawing out well into inhuman quantities. "Enough to... Ohhh... Finish the job." He continued to pump more and more. Balls topped up by the chronivacs world altering code. Inside he could feel the tip of his point cock poke through the ring of its Rat cervix, dumping his fertile load into her fecund womb, brimming with eggs ready to be fertilized.
Her womb wasn't the only thing absorbing the cum as her body began the process of taking in the mutating fluid.
It was a slow process at the best of times, so by the time she was ready to burst with inflated cum, nothing had really started yet. Instead the back pressure of the unending supply of cum began winning against the clinging power of Rat's vaginal muscles.
Eric felt his cock slide back and inch, making more room for him to fill up, as Rat grabbed tighter with it's pussy. The pressure built again and Rat began to inch off again, this time squealing, "Noooo!!! Mooooree!!! Brreeeed". In horribly mangled English.
Eric kept filling and filling. Grunting as his body kept shaking more and more cum out. Falling to the floor he pinned Rat under his weight, using gravity to help drive his cock deeper into her womb, Rat mewling unintelligibly below him.
The pressure built again as Rat attempted to hold on. His cock was beginning to thin at her labia as he was pushed closer and closer to the tapered tip. Each slip getting nearer and nearer to total release until finally. Two thirds of the way out, his cock has tapered too thin for Rat to hold on to, and with a sickening squelch, and a ragged cry from Rat, her muscles finally gave up. With a wet *POP* and a welter of chunky Rat cum, the last of Eric's cock popped free of Rat.
No longer held back by the plugging Rat cock near a gallon of cum began pouring from Rats swollen snatch, drenching it's ass, thighs and tail in a puddle of steaming smelly cum. Feebly Rat began pawing at her snatch, slipping clawed digits into her gushing slit, attempting to push cum back in. "Mmoooorreee!!! Neeeeddd..." Tears of emotional exhaustion rolled down her muzzle.