Try kicking your prison.

Original Author: starlock

You sigh as you feel slightly helpless at the current situation, and in frustration after finding there was no means of escape, you kick the wall of your older sisters ball.

"Hm?" Kim muttered, feeling a slight bump in the testi she was stroking.

Realizing that you'd made contact of some kind, you kicked again, Kim giving the ball a very light, careful squeeze in response. Not comfortable with her trying something like that again, you decided to look for another way to get out of Kim's nut (which upon pondering his situation just sounded completely insane!).

Upon some exploration inside of Kim's unexplained genitals, you discovered that you had one of three options of escape, though none of them were exactly ideal; the first was through the bloodstream, though you had no idea where such a trip would take you, and you'd rather not intrude upon your sister's body more than you really needed to. The second, back out the urethra the way you came, but it was a tight fit, and seeing how you were sucked in, her dick would probably not so easily let you out. The third and last entrance, you had no idea WHERE that would go, and unless no other options opened them up soon, you didn't really want to know where it would lead you.

Just as you were starting to say 'screw it!' to looking for a way out and go back to the nut where you were first deposited, Kim's cock started acting up, and sperm started pumping through the testicles as the shaft they were connected to started to harden once again.

Just what the hell was Kim up to out there?!