There are many times Mona has wanted to kill Phineas Filch. When she sheds, when she has to scavenge in a trash can to survive, when she watches her parents standing over her own grave and thinks of how they'd scream if they saw her.
But now, now she hates him so badly she can barely breathe. She's curled up on the couch in her dinky little apartment, clutching her stomach as she's wracked with pulse after pulse of searing heat. Her head swims, her heart flutters, and her tail throbs painfully.
Raph. Call Raph. She fumbles for the turtle-com he gave her, but her hands twitch and she lets out a gasp as it shatters in her hand.
"Fuck," Mona chants, staggering to her feet. "Fuck fuck fuck..."
She needs to get to the sewers. Donnie can help her, or at least figure out what the hell is going on. She should have gone there earlier, to be honest, but she'd convinced herself it wasn't as big a deal as she'd thought, and now her guts are on fire.
Mona shrugs on a coat before she staggers out of the apartment, down the street. The paving stones sway under her feet, and the footsteps of passerby ring out like gunshots.
Get to the sewers. Get to safety. She makes her way to a spot she's used before, a manhole in a secluded enough alley where she can drop to her knees and wrestle with the manhole, grunting. Usually she's strong enough that this isn't an issue, but now Mona's head is swimming, her fingers shaking, and she can't--
"Mona?"
Her head snaps up at the words, at the woman holding grocery bags at the end of the alley. Red hair, yellow jumpsuit, and and and--
"Are you okay?"
That smell, oh Jesus fuck. Like every sweet thing she's ever hungered for, every horny thought she's ever had, kicked up to a million and solidified into a crystalline punch. The mutagen sings in her blood, sharp and bright and hungry. Mona sucks in a breath, staggering backward. What the fuck what the fuck what--
"Oh my god--" April drops her bags and runs to her side, filling Mona's nose with the sweet, vulnerable scent of flesh. She whimpers.
"Shhh, hey, I've got you." April helps her stand with a grunt of effort. "Gosh, you're burning up!"
April's hands are soft, so soft, and her tail is on fire. Her thoughts are melting under the heat, shifting and flowing, reality flickering hazily around her. "Hurts..."
"It's okay." April reaches for her pocket. "I'm calling the guys--"
There's a blur, and the phone goes whizzing into the wall with a loud crunch. April's jaw drops.
Donnie's going to be so pissed at me, Mona thinks sadly. Then she watches with interest as her hands come up and grab April by the collar, slamming her against the wall. April lets out a yelp. "Mona!" 
Something flickers through that picture-perfect scent. Fear? No, just surprise. April's been kidnapped so many times she's not really frightened of it anymore.
Not yet, the mutagen whispers. Soon.
So hot. She's too hot, stripping off her clothes and wig with an angry grunt. And April...the mutagen swims over Mona's eyes, frying her brain into a helpless buzzing mess, she must be sweltering in there.
"Jeez, Mona!"
Help her out.
One hand keeps April steady while the other rips through her jumpsuit, sending buttons clattering. April cries out--this, this is new. Mona feels her face twist into a smile as she tears the whole goddamn thing off, tossing it into a mud puddle. April's left bare and trembling in her underthings, goosebumps rising across her skin.
"HEL--"
Mona shuts her up, yanking off April's panties (she feels strong, so strong) and stuffing it into her mouth. She whimpers frantically as Mona makes short work of her bra, crying out when a strap scrapes across her skin. Her creamy white tits spill free and Mona grabs a handful, squeezing so hard April lets out a muffled shriek.
"Beautiful," Mona hears herself rasp. She's not entirely sure what is happening, but the heat doesn't seem bad and the smell is as intoxicating as ever and April is, well, beautiful. Mona lets her hand wander over her breasts, the flat plane of her stomach, the curve of her hip, the tremble in her thighs.
She runs a cautious finger through the red thatch of hair over April's crotch and she squeals, trying to press her legs together. "No," Mona spits, shoving forward. April's body just feels so perfect against hers; the frantic rattle of her heartbeat is the icing on the cake.
Her tail is changing now, the painful heat turning into something slicker and much more appealing. She can feel it tensing up, quivering at April's pretty little noises. 
"That's it," Mona whispers. "That's it." Her cunt is damp and aching, and her tail is...is twitching, fast and hard and painful. Trembling with need, and shaking up the rest of her so hard she can't process anything except want. She rips April's panties out of her mouth.
"Mona, listen--"
She smashes their lips together, shoving her long, long tongue down April's mouth. April lets out a startled squeak, nostrils flaring desperately for air. Mona groans, feeling her tail flop free and rub up April's thigh.
She pulls free, but doesn't give up April time to catch her breath before planting sharp, hungry kisses down her neck, drinking in her scent. "Mona," April groans, trembling like a leaf. "Mona, what, what--"
Mona flicks her tongue across April's breasts and the words trail off into a whimper. She drags it across again, again, smirking to herself as April seizes for breath. She wants to take the other woman's tits into her mouth and suck, suck and tear until her mouth is filled with milk, with blood...
But no, not yet. There's a tantalizing flicker of pleasure mixed in with April's scent, but the fear has grown by now, sharp enough to overwhelm. Mona needs to change that. So she stuffs the panties back into April's mouth and hoists her over a dumpster, yanking her legs apart.
And then...well. A cunt like April's is so tantalizing it has to be tried out, doesn't it?
"MmmmmMMMMMphhh..." April's heels clatter frantically against the trash can as Mona's tongue flicks across her pussy, toying with her clit. Mona lets out a grunt, glancing over her shoulder to the nearby manhole. She can't quite remember who lives down there, but she knows they would stop her fun if they spotted this. She needs to pick up the pace.
So she does just that, reaching up to toy with April's clit as she slits her tongue slither deeper. April whines, a sound that makes Mona's tail thump like an eager dog against the trash can..
It doesn't take long for something wet and delicious to dribble over her tongue. She sucks it down eagerly, which makes April moan as her thighs grow slicker, so Mona laps at the fresh fluid even more eagerly...
And then April's spasming around her, heat flaring over Mona's face. She pulls her head free to watch the other woman shutter, red hair stuck to her sweaty face, all that fine polish stripped away. Mona loves the sight so much it hurts.
She tugs out the panties and kisses April again, slow and deep. "Mona," April groans into her mouth. "That was, that was..."
Mona frowns. Was? Does April think it's over? She lets out a low growl at the insolence, hoisting April up again and slamming her against the wall with a low grunt.
"Nnnh..." April's hands batten ineffectually at Mona's chest. She can't feel anything right now, except for the fire. Her tail starts pushing April's legs apart and she freezes, finally registering it's presence. "Mona...?"
"So pretty." Drool spills from Mona's mouth as she says it. The mutagen is twisting and pulling on her like puppet strings, begging more, more. She'll make April beg for the same.
"Stop it!" April lets out a squeal as the tail nudges at her dripping cunt. "It won't fit!"
"It w-will." Someone as sweet as April needs to be stuffed, filled, ruined and remade. And Mona's the only one around who's lizard enough for the job. Her tail-cock shoves farther and April screams, legs kicking. There's real pain, real fear in her voice.
"Hush. Hush," she whispers, in time with the steady rub of her finger over April's clit. "So f-fucking sweet, you're--"
She pushes in, and April opens her mouth to shriek. Mona silences her with a kiss, pushing her tongue down April's throat. Her tail is pulsing with more nerves than she imagined possible, fluttering and trembling eagerly as it pushes deeper and deeper.
Finally, when the whimpering becomes too much, she pauses to let April adjust. Mona idly toys her breasts, dragging her fingers down April's tits hard enough to drop the faintest drop of blood. April doesn't seem to notice, her eyes glazed, the faintest line of drool spilling from her mouth.
Mona waits for the perfect moment to give her hips a vicious snap, so hard that April's head bangs against the wall. Mona frowns--that's not what she wants, not quite--so she wraps April's legs tight around her waist and braces her hand behind April's hair, holding her head in place as they fuck.
And fuck is the right word for it. Not making love, not having intercourse, far from something as clinical as sex--it's fucking. Mona's tail thrusts away, each movement summoning a fresh burst of pleasure that arcs down her length and into her cunt.
She digs her fingers into April's ass, clutching hard enough to bruise. Her tight, wet heat is the worst kind of drug, and Mona loves every fucking second of it. She could die here, right now, and be happy.
Mona's kissing April so hard neither of them have much chance to breathe, although she does occasionally pause and let April gasp while she feasts on those perfect heaving tits. Her fingers rub April's clit in just the right way to make her grind down frantically, even when Mona's massive length makes her offer up little hisses of pain.
But eventually she adjusts enough for the pain to spill into something very different, hard as she tries to ignore it. She stops struggling, too swept up to do anything except cling desperately to Mona's shoulders, heaving and sobbing for air. 
Later, Mona doesn't remember much, but she knows she stopped making human noises at some point. Just little hisses and growls and churrs, an animal symphony spilled into April's groaning mouth.
If she could translate it into English, she might say gonna breed you. Gonna pump you full of eggs, sweetheart. With each thrust, the picture of April on her back, eggs spilling from her pretty little pussy, becomes clearer and sweeter. Big dripping eggs, large enough to strain, to make her wail with every push. Hmm, maybe Mona would shove herself down April's throat while she's at it...
She sinks her teeth into April's neck at the thought, and gets a helpless, broken sigh in return. It's just enough to send Mona spiraling over the edge, coming and coming, eyes rolling in her head as the shudders rip through her body. She's never had an orgasm like this before.
Her hand spasms desperately against April's clit, and then she's coming too. Mona feels her slide, suddenly boneless, and then they're both tumbling to the filthy concrete. Her dripping tail spills between her legs, boneless.
April just lies there on her back, eyes blank. "Mona," she whispers. And then again, like she can't think of anything else to say. "Mona."
She's looking battered and worn out, and a flicker of regret breaks through Mona's haze. She picks April up and hauls her close, rubbing a gentle hand over one tit.
It'd be nice to cuddle, but...Mona's eyes flicker to the mysterious manhole. Something tells her they're pushing their luck, she should take her prize away right now.
Because at the back of her mind, the heat is buzzing all over again. Relentless and inescapable, not that money would ever escape it.
She tosses a still-naked April over her shoulder and struts off down the street, into the coming night. There's a dopey smile on her face, teeth glinting in the streetlights.
If she could think clearly enough to remember his existence, Mona would think that maybe Phineas Flich's meddling wasn't so bad after all.
 
April doesn't know how long she's been here.
She knows it's been a while, but whether a "while" is a few hours or a few days is unclear. She doesn't even know where "here" is, to be honest, just that it's small and dark and tucked away from the world.
But she does know that she's slick with body fluids and jelly-limbed after having more orgasms than she can count. Mona's made her coma enough that it passed through pleasure into pain to a strange buzzing numbness, dull and heavy between her legs.
Nothing else seems real beyond this place, not her friends, not her job, not everything that mattered so much. There's just the choking scent of sex and the feeling of being so full she can feel it in her guts.
Mona's fucking her right now, in fact, with the weird tail-cock between her legs that has found quite a little home in April's sore, stretched pussy. Her eyes are still glassy and strange since this started, her skin far too hot.
April's pretty sure she's still in shock, that that must be why she's not afraid anymore. Or maybe she's just too darn tired to be scared. If this keeps up she's pretty sure she might fall asleep with Mona still inside her.
Speaking of Mona, she's shoving April so far down into the mattress it's going to have an imprint of her body if she ever manages to get off it. Mona's tail is so far deep inside her they seem like one woman, bodies intertwined in an unbreakable web.
Mona's still naked, her eyes still glassy and wild, her skin still burning up from...whatever is going on with her right now. April thinks it has to wear off eventually, right? Or otherwise the boys will come save her, like they always do. And then what?
Guilt. Shame. Fear. The ugly possibilities flicker across her mind, burned out with another snap of Mona's hips, another flash of ecstasy. April doesn't want to linger on that right now.
Now Mona's humming low in her throat as she rubs April's belly, cooing gently. April doesn't know what that's all about. Mona's not really coherent right now (and neither is April, to be honest). Although, did she whisper something about children a couple fucks back?
April's hoisted up suddenly, balanced on Mona's tail as she clings for dear life. It's so deep she can't do anything except scream, frantically grabbing at Mona's shoulders.
The past and the future melt away. All April is--all they both are right now--is want. So she holds on tight and lets Mona fuck her brains out. 
"Beautiful," her lizard rasps, staring into April's eyes like she's the center of the world. And a part of April isn't that surprised when she hears herself gurgling it back.