Refuse

"N-no, it's too risky" you stutter, getting up from the bed, slipping on a pair of panties and rushing to the door. With how your bodies react to each other it's way dangerous to even be in the same room. You turn back to see your sister's disappointed face "See you tomorrow Gwen.."

"See you tomorrow I guess..." she mumbles as the door closes behind you. You walk purposefully back to your room, not looking back, lest you change your mind. As soon as you get back to your room you fall flat on the bed, unsurprisingly exhausted. Despite it barely being early evening you drift off to sleep.

*ring ring*

You're woken up in the middle of the night by familiar ring of your cell phone. You sluggishly pull your phone off the bedside table and look the screen.

Who the hell calls at 2am? You thought. I don't know the number but it doesn't look like spam. You pressed "accept"

"Hi dear!" a familiar cheerful voice rings out "How was your first day as a girl? Still think the other half have it easy?"

"You.." You gasped as you recognised the caller. "You perverted bitch!" you whispered furiously

She laughed. "Pot calling the kettle black there, hun. You did everything you could to tease your sister into a hot mess, and got the creampie of a lifetime for your troubles. Even now I bet it turns you on just thinking about it."

You tried not to think back, even as your lower body reminded you. "You said that I would only stay as a girl if I actually got pregnant, and thanks to that pill Gwen gave me, that isn't going to happen."

"You are indeed correct and that would be no fun for me, but there's one small issue -- they only work if you haven't produced an egg yet, and your young ovaries wasted no time in getting a fresh one out to meet your sisters seed"

"W-what?" You gasped.

"Oh yes, when I said fertile, I meant VERY fertile."

"But..." You trailed off and sat silently. With your last hope for life as a guy dashed, you felt a sense of despair as the gravity of the situation sunk in.