Let's do this! Drink the potion!

On one hand, you had been tempted to call it quits and stop having sex with your dad. After all it's starting to cause quite a few problems for you! Mom is home too, so doing it in secret would be even more difficult. On the other hand, the idea of getting fucked into submission... sounded kinda hot? The idea that simply being stuffed full of dick would be enough to make you squirm in pleasure.

"Sure, let's do this!" you answer enthusiastically before raising the vial up to your lips and drinking the contents. The smooth chilled liquid oozes right down your throat and makes you shiver in response! "Is it working? Well?" Your sibling looks at you with eager eyes, she clearly never even contemplated using the potion on herself! After all if she'd drink it herself and something goes wrong, she would be stuck in her body. While you're able to drink it and eventually switch bodies again regardless of what the potion does. It makes you the perfect test subject!

"... I don't know?" The cold sensation fades but isn't followed by anything else. "What's supposed to happen?" you add while setting the empty vial aside and lowering a finger down to prod and push against your crotch. "How long does it take for it to work?"

"It should be instantaneous, if it works. Could be a dud? It might even need multiple treatments. We'll just have to keep an eye on it." Well that's disappointing after how much she hyped it up! Your lady bits remain rather... unresponsive and dull. None of the fireworks and explosions that you anticipated... "So what now?"

"Just go about your day as usual. What did you expect, rainbows?" Gwen shook her head. She's a scientist. She's not some witch with magical powers.

"Hmm, all right. Thanks I guess." Your gratitude was lackluster of course, you expected a whole lot more after drinking one of her wonder medicines. After getting back up on your feet, you give her another reassuring smile before leaving the room with a frown on your face. It didn't exactly make you any happier that your thighs felt glued together. Sperm was STILL oozing out of you, and had been for over an hour already! As you take a quick look around you see there's nobody to disturb you -- you sneak into the bathroom and toss your clothes into the washing machine before taking a good warm shower! It had been your first opportunity to clean yourself undisturbed ever since your dad popped your creampie virginity. With a handful of soap, you slather up your body, wash your perky breasts, tummy, and ultimately the sex-stained triangle between your legs. The sticky goo had leaked into every crevice and fold of your 'little lady' and was a pain to wash off! You don't even bother trying to wash the insides of your twat, most of his cum had probably been absorbed already. Which is also a weird thought. Your vagina absorbed your father's cum... and now it's permanently a part of your genitals... talk about having mixed feelings about a situation...

After showering, you wrap a towel around yourself and return to your own room. There's not much else to do, so you start up the computer with the intention of playing some MMORPG for a while! There's a fun one with elves and orcs that'll get an expansion soon, so maybe that's entertaining? On the other hand you could also just watch some porn and rub one out...

But as soon as the desktop is displayed, a ton of notifications begin to pop up! Stream ended, do you wish to upload the video? The bold YES button had been highlighted already, someone else must've clicked it... but what video? You follow the links and end up on pornhub of all places, did your little brother use your computer to jerk off again? Hasn't he been jerking off into your mom's pussy for the past few days? Na this is strange... you find the unfamiliar account connected to the video -- "Daddy's~Daughter"?

What kind of pervy dude comes up with a name like that? Must be someone who has read a few too many **** fanfics, probably. It's only when you actually watch the recording that you quickly recognize your pretty little cunt being on full display! Moments before your father's dick pushed in to give your cervix a sweet little kiss, what the fuck?

The chat had been recorded as well, something worth taking a look at...

Anon: There's no way this is real, is this real?
Anon: This is hot! Fuck her! He should ruin her little cunt!

A cough escapes your lips and you feel yourself blushing with a nervous feeling all over, like ants crawling up your skin. It's weird to have guys talking about you as if you're just an object? Like. Come on! You even used to be a guy yourself, you deserve a better treatment than that, right? It's also strange to see just how many of them are obsessed exclusively with your vagina -- don't they know of breasts? Thighs? Butts? Girls have so many tender and nice areas! Yet it seems like most of them care only about the little pleasure hole between your legs... you remove the towel and take another look at your peachy slit. It's kind of awesome! The thing already looked just like nothing had ever happened. It's impossible to tell that you had sex just an hour ago! Just a subtle mound with an even more subtle entrance into your body hidden somewhere between the puffy folds. Either way, you direct your attention back at the screen and continue reading what the viewers had been interested in...

Anon: Nice!! How many times did he already cum inside her?
Anon: She's so young! I bet her cunt feels tighter than a virgin's!
Anon: Didn't she remove her diaphragm? That idiot is getting herself pregnant by her own father, awesome!!
Anon: He should inject her with some fertility ****!! That slut deserves twins!!

You suddenly interrupt yourself -- pregnant? Pregnancy? An intense flash of memories passes your mind, of course you can get pregnant! That's why your mom had placed the diaphragm inside your twat in the first place! But why did your dad have you remove it then? Unless... did he really enjoy this emotionless friends-with-benefits deal enough to trick you into making it PERMANENT? What the hell was he thinking!? If he wants to have easy access to pussy, he could've just picked up some chick from tinder!! This isn't just some brief vacation in another body! He should be fully aware that you are cursed to remain in this weak-ass female body for good if he accidentally gets you preggers! Besides, did he forget the part about ****? He's literally your own father so why the hell would he try to impregnate you? You would be pregnant with a kid that's both your daughter AND your sister at the same time!!

Dropping your gaze, you take another look at the impish little cunt of yours. This time from an entirely different perspective! It's washed and clean but you probably still had some cum inside you, maybe enough to knock you up? Nope, fuck that!

After turning away from the computer, you approach your trash bin and find the diaphragm still on top of some discarded tissues. Perfect! This time you know where it belongs and what it's used for, and you don't hesitate making your way to the bathroom to try and put it back inside! You awkwardly squat down in front of the toilet, spreading your legs and moving your hand in place between your thighs while holding the latex dome... it was just an inch away from the naked folds of your pussy. Those cute little lips which -- right now -- were still completely unprotected and ready to be inseminated again. But...

"Playing with yourself again, John?" The mature, deep voice of your father appeared from behind as he entered the small room. "How about we strike a little deal, you're not going to touch yourself anymore and neither will I. After all we've got each others genitals to masturbate with now, am I right? This sure is handy. If that witch-friend of yours gives us another call, be sure to tell her my gratitude. She couldn't have given you a better body!" His greedy gaze went down to your youthful vagina and he spotted the diaphragm in your hand but also your hesitation. It took him another moment to remember that you're still **** -- any thoughts of a pregnancy are fleeting and quick to fade away. "Did you forget what you planned to do? Here lemme give you a hand," he spoke while helping you to stand back up.

All the talk had distracted you... wasn't there something urgent you needed to do? To prevent... something? Or to do... something? Your mind turned into a foggy mess again... the medicine had regained its grasp on your memories. "Here," he offered while taking the diaphragm out of your small hand, and nonchalantly dropping it into the toilet bowl. It lingered there on the white porcelain. "The new body is still a bit confusing, hmm? Come come," he instructed while guiding you to sit down on the toilet seat. "Now all you need to do is relax."

"Huh...?" What was he planning and why were you supposed to do those things? Why were you in the bathroom anyway, what was it that you planned to do? What DO people usually do in the bathroom...? Well... only one thing comes to mind... man this is embarrassing. But he's been married for a long time and helped to raise a daughter, it's probably not the first time he had to watch a girl do this...

You relax as you've been told and feel yourself gradually getting less tense, until at first a trickle, and then a stream of urine hits the piece of latex below. You keep going until your bladder is empty while your father's watchful gaze lingered all over you, and as soon as you finish he simply hits the trigger and flushes everything down the drain and away -- including the diaphragm! This time it had been truly and utterly discarded like a simple piece of trash.

"Now let's get you back up," he instructs while using an arm to support you, his other hand grabbed a slice of toilet paper to wipe your twat dry. So humiliating... but he sure seemed to know more about your body than you knew yourself! "D-dad!"

"Ah-ah! Use the right word." His tone was condescending as much as he was annoyed. "Right. Daddy," you correct yourself only to have him suddenly moving both arms underneath your body and easily lifting you up and off the ground! "H-hey! What's this for? I can walk just fine!"

"Oh you cutie," he mused with the same condescending tone. But this time it sounded even more sinister, like a secret he could barely manage to keep private. "Let's see if you can still walk 'just fine' in a few months from now after putting on some weight." His lecherous gaze lingered on your belly and he began carrying you to your room.

"Like Jimmy? Like hell I'd let myself go and get fat like an idiot," you remark since that fool is CLEARLY way below you. Dad responded with another knowing smirk. "Oh don't worry... there are times when it's perfectly acceptable for a woman to gain a few pounds."

He dropped you off on the soft sheets of your bed, briefly did something at the computer, and then began stripping.

It was weird as hell, yet again. Obviously when you're naked it's allowing him to enjoy the sight of a fertile teenage girl in the prime of her youth. Which is awesome. But as you're watching him get naked you simply can't see anything but the familiar shape of your father, the person you grew up with! Being nude around him was awkward and it's even more weird to have him constantly look down at the hairless cunt you now possess... if you had been born as girl, how many years would he have waited before taking your virginity for himself? He probably would've made sure you never get a boyfriend either.

And -- "Wait, are you streaming this again?" As you peer past him, you can see the webcam blinking green and confirming it's active. "Of course I am, this is how you get to earn your pocket money from now on. Even that is up for debate of course... just see it as necessity for you to repay your college fund, now that you'll have to start all over again. After you paid off the debt for your first trip to college as male, we can think about saving up a little bit to let you study as female." By now he was completely naked and lazily stroking his cock while approaching you on the bed. Another glance at the webcam allows you to spot it's still blinking instead of showing a steady light -- so he's recording instead of live streaming! So he can edit the tape and remove any personal information from the video...

"Wait, what? You lost your job and now you are using it as excuse to fuck me in front of an audience?" He grabs your ankles and lifts your feet up and on to his broad shoulders. With your legs parted so widely, your pussy was on full display and particularly easy to access while he moved on top of you! "Basically, yeah. That's your new identity. You're daddy's little slut from now on." He suddenly lunged forward and the blunt crown of his appendage thrust against your peachy slit, eliciting a groan out of you! He missed his mark! Without missing a beat he's already allowing the bloated tip to slide an inch downwards and giving you another demanding push -- this time hitting the spot! The **** petals of your vagina open right up and stretch immensely to accommodate the sudden intruder! An adult's cock shoves its way right back into your tight little cunt!

"Ahnnn--nnh!!" You gasp! You moan! You're inhaling sharply and exhaling at the same time while your entire body tenses up! No amount of breathing seems to deliver any oxygen and you watch your vision dimming and fading out while bucking your hips forward like you'd gotten electrocuted! Your crotch feels like it's on fire! ... but in a good and intoxicating way! "Nnnh! Fuck!" You swear and curse but ultimately keep thrusting your hips back against him! Intense waves of pleasure just keep on crashing over you! More, more! How can this feel so goddamn good? "Daddy!" you exclaim sharply with your precious young voice before it's getting too much, way too much!

You throw your hands to the side and desperately grasp the bed sheets while trying to hold still, but the thick presence inside your cunt lingered! A heavenly sensation just kept on rolling through you, pushing you over and beyond a mountaintop only to drag you right back up to the next peak! The overwhelming feeling of your first proper, female orgasm. The mixture of bliss and torment doesn't last long -- unable to even breathe properly, you soon feel your vision turning dark... the last sensation you're aware of is the rhythmical slapping of flesh against flesh. Your father's crotch repeatedly impacting with yours. While you're relishing the best orgasm of your life, he continues enjoying the hospitality of your teenage cunt. He had another 12 hours to make sure you end up pregnant...

Even as you pass out, he had no intention of sparing your receptive pussy... his next demanding thrust was finally too much, your eyes roll back and your vision goes black...
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