A Blue Pill

Mira picks up a blue pill and holds it in front of you. "Now, little 'sister,' did you think that you were the only one who played with these pills?" She then swallows it quickly, letting you watch as your beautiful naked sister turns in a muscular, hung young man who is looking at your body on the bed like he won the lottery, and you're the prize.

"Do you like my body, 'sis'? My girlfriends love it when I draw the short straw and I have to take a blue pill." Your eyes are drawn to the 10 inch erect cock Mira now has between her legs. "Of course, we learned a few months ago that I can't use this thing on my friends without protection. Remember Monique and Monica?"

You nod when you remember the brunette twins that used to be your sister's best friends, and how, shortly after they got pregnant, they stopped hanging out with your sister. You had fantasized about their perfect fitness model bodies, with matching c cup breasts and round asses that would make a Kardashian want to hire them as body doubles. "Wait, do you mean what I think you mean?"

"Yeah, as Maury would say, I'm the father. " Your sister responds with a deep laugh, "her" voice marching the body that any college football player would kill for, and that any cheerleader would spread her legs for. "Apparently this thing is very potent. Of course, as deep as I was in them and with how big my balls are, I can see how it would be. My friends now insist that I use a condom and pull out if I even think I'm about to shoot. Of course, since you're on X-Change, and I know that you wouldn't use anything other than a Basic your first time, I know you're totally safe." Mira says this as she's slowly stroking the baby cannon between her legs.

At this point, you're very conflicted. On the one hand, you're about to learn how it feels to be fucked like a real girl, and if your sister is to be believed, she is going to make it as good for you as it is for her. On the other, you did buy your pill off the street, not in a pharmacy. If it was a knock off version, or a longer lasting one, your new ovaries have dropped at least one ovum since you took it, and your sister has the perfect tool to find it. If she knocks you up, you really do become her "little sister" Leah for good.