You're lucky, for now at least

Gasping for air, you try to catch your breath after the awkward, intense rubbing you just received. "Jesus... take it easy next time. That was worse than getting punched in the dick," you point out - even if it managed to make you climax - while your little brother slowly pulled out of your sore cunt. You're pleased to see that he got at least one thing right, the condom was still snugly wrapped around his appendage, with a grotesquely bloated reservoir at the tip, full of his cloudy spunk. Jesus, his testicles must be determined as heck to reproduce if they're able to pump out loads of THAT size. It was kind of fascinating, even a drop of that stuff would be enough to ruin your life completely. And to think that just a day ago, you would carelessly jerk off and empty your balls into a tissue like it's nothing. That gooey stuff turned from something insignificant into something that could change you forever. Crazy.

"Here, lemme help with that before you mess it up," you offer while turning around and carefully sliding the latex protection off his dick, and tying a knot into the end to prevent the contents from spilling out. Upon removing the condom, you could see multiple globs of sperm still sticking to his purple cockhead before his foreskin automatically slid back up and engulfed that bloated tip with his protective layer of skin. Looking back up, you smirk at his exhausted expression. "So whaddaya think, pussies are pretty nice huh?"

Jimmy was still breathing heavily and enjoying the warm afterglow of his orgasm, and the sheer amazement at the fact that he's no longer a virgin thanks to his "brother's" help. He dropped backwards onto his bum to gather his composure. "Yah, fucking a pussy is SO much better than jerking it. Sucks that you insisted on using that shitty rubber, probably ruined the experience..." You two get a little more comfortable by slipping under the warm, cozy bed covers with him spooning you from behind.

"Nah it's... not all that different."

"How should I know? Hey, how about you lemme put it in again, just the tip or something?" Ugh, he just had to go there. You sit there in silence. He's still got the chance to tell your parents about your changes if you don't manage to keep him on the friendly side, and now that you're a chick, he sure seemed to enjoy your presence a whole lot more than before. Or at least he enjoyed that warm, damp chasm that replaced your cock. Still, considering he just came and wasn't even fully hard, this could be the safest time to allow him a brief exploration of your lady bits without any barrier to separate his dick from your fertile vag. Just an hour passed but you already got fed up with the responsibility of being a girl.