Nope, nope! Decline the offer, get out of there

You grumpily stare back at the pill she placed on your palm. There's no fooling around with all the strange medicine she's got access to, Gwen must've really pulled some strings to get such crazy ****! There's no doubt in your mind that a vast majority of them would in one way or another change either your body, or even your mind? It's dangerous stuff and you can't risk underestimating it.

Not to mention the last pill she gave you already posed some MAJOR problems for you and your plans. If she wasn't kidding about the effect, it means that any sperm that enters your vag will be more or less stuck inside you as one sticky batch of cum. Sure you're less likely to walk around like a leaking faucet with semen dripping down your thighs, but the opposite is even worse -- knowing that any sperm that manages to enter you will be permanently nestled inside your twat until you bother to manually remove it from that soft fleshy sheathe of yours! That's just fucked up.

With just a single pill she had already turned you into the perfect cum-dumpster, lord knows what else she might have in store for you! This is one offer that you have to decline for sure. "Nah thanks... it's uh... like Jimmy said, I prefer doing things as natural as possible." There, at least you were able to use some of the non-sense he made up earlier, to your advantage now. He inhaled and was just about to speak up again -- probably plotting to put you into more danger -- and you swiftly silence him with a subtle elbow to the kidney. He bends over and coughs while lifting his arms to hug his chubby belly.

That'll teach him to keep his mouth shut, maggot needs to know his place. You're still the older brother.

"Aww, looks like my boyfriend had a bit too much to eat," you point out innocently while wrapping an arm around him adoringly. "I guess I'll guide him upstairs so he can rest up a little after such a long, exhausting day for him. I am so incredibly lucky that my life isn't as tough as his," you speak sarcastically while glaring daggers at him. If looks could kill then he would drop dead on the spot. Ironically, he looked even more impressed by your confidence and defiance. Maybe you are just the type of girl that he's into? To be fair he's a nerd and a loner, so he would date ANY girl that would fuck him willingly. But if he starts having a crush on you? Now that would be... problematic. Emotions always make everything more complicated. You sure as hell don't need him to fall in love with you right now. It's also troublesome that he seems to have a habit of letting his dick do the thinking. At least this was a good opportunity to leave the room, since you can feel yourself increasingly full of anxiety and awkwardness at the fact that both your parents had been inhaling the musky scent of your teeny cunt for the past few minutes.

It also didn't make you feel any better that the batch of your bro's slimy semen which he had deposited just a few minutes prior was solidifying and coagulating somewhere inside your sore vagina. At least a normal girl would feel reassured to know that after receiving a creampie, she could just wipe her pussy clean with a tissue and be happy that she's mostly cum-free again at that point. Simple. Easy. You are gonna have to awkwardly swirl your fingers around inside your twat to **** most of your brother's ejaculate to come back out, and you sure as hell aren't going to do that in front of such a crowd. "Well, gotta go," you repeat again as you stand up to leave.

A tug on your wrist gets you to turn back around towards your mischievously grinning mother, who promptly lifts her hand up and pops an unfamiliar pill into your mouth. It happened in an instant -- you barely even had time to register what she did -- and with a flick of her finger it simply bounced forward and against the back of your throat, upon which you instinctively swallow. A regrettable reaction you realize less than a split second later.

You cough, but it's already on its way down into your stomach!

Your mother laughs gleefully as if she's just made you part of a particularly funny prank.

"Oh dear, you should see your face! Stop worrying so much, honey. I wouldnt do anything bad to my son's girlfriend! It was just a lil' fertility booster! You know, since you seem to be so easy-going about getting pounded! Just a bit of medicine to get your lady parts to work extra hard, ya know? From now on you two will have to be a wee bit more careful. It miiight also have a tiny side-effect of making you care less about the risks of doing it bareback, the chance of getting pregnant! So instead of handling all that responsibility yourself, you will have to rely on your boyfriend to help you out as well! A bit of teamwork! Isn't that just the absolutely sweetest thing imaginable?" she chuckles heartily while you stare at her intensely with your wide open eyes. Does she have ANY idea how much she just fucked you over?

Already now you can feel the pill hitting the bottom of your stomach. Being digested. Entering your bloodstream. The chemicals already start doing their thing, slowly at first. Both of your ovaries jump to life and prepare to release an egg... the lining of your womb thickens and becomes even more welcoming for an impregnation... your cervix softens just enough to make it easier for sperm to swim through... and the inner temperature of your vag begins to rise to make it just that much more welcoming and pleasant for a penis to be in.

While you silently watched her chuckle in delight, your loins turned into a nice little breeding ground.

Bad time to be horrified!

"Haha, thanks, great!" you blurt out before starting to push Jimmy along and up the stairs before firmly nudging him into his bedroom. Shit, shit, shit!! Next up you run into the bathroom and smash the door shut, rush into the bathtub, grab the shower head and flush your pussy with lurk-warm water. From past biology lessons at school you remember that this is rather unhealthy to do, but in an emergency like this, you had **** but to keep aiming the intense stream of water directly into your slit and wash away all traces of your bro's cum! It's by sheer luck that you didn't accidentally aim the stream in such a way that you **** the semen right through your cervix with the water pressure. Fat globs of sperm spilled out of you and flowed down the drain... it takes a while, but you do somehow manage to wash away every last trace of his sticky deposit. Your insides are clean and pure again!

A bad feeling lingers in your gut as you stare down at your womanhood -- the lips of your pussy were swollen and red, slippery and ready... just an hour ago your stubborn vagina already had problems just getting wet, and now it was drenched and prepared to be bred. It's like you've suddenly gone into heat! The stupid medicine sure worked nicely. You can only hope that the other part -- the side-effect your mother mentioned -- wasn't true. Something tells you that relying on Jimmy to keep your womb safe and secure was going to be troublesome. On the other hand, you can trust him not to fuck this up since he's the only other person who KNOWS that pregnancy is the only taboo you absolutely cannot break. Looks like you will have to keep him happy for a little while longer, in exchange for guaranteed help...