your sister

You smile when you see your sister, naked as the day she was born, standing there rubbing her pussy at the sight of your nudity. For a moment you forget your need to pee and hug her tightly. You hadn't seen her in nearly 30 years, ever since the "falling out" that happened at the family reunion. You step back a bit to get a good look at her. You would think seeing your sister, someone you grew up with and spent so many years living with, naked would be embarrassing, but strangely you find her body extremely sexy. She always was a knock out and now is no exception. She twirls to give you a better look at her. She has really blossomed since college. The two kids have not ruined her figure either so she is still a regular hotty. You reach out and stroke her pussy slowly as she grabs your cock and strokes it slowly. Now, you might be thinking "why would I just suddenly reach out and touch my naked sister, even if she is somehow hot to me now?"

The new rules about nudity have also effected your taste for sex. Since the world is now a place of free use, essentially, even **** is not a taboo any more. Not only that but your desire for sex has been ramped up to the point that you engage in sex with literally everyone you find attractive on the spot. You no longer bother with foreplay. You just go right for the sex. Since your sister is so hot, you just couldn't help initiating sex with her. She now pulls you close and slides your cock into her pussy as she wraps her arms around your waist and kisses your lips. You moan as your cock slides into her. Pulling her into a deeper kiss, you start to fuck her purposefully. Each stroke making both of you moan. It is while you are fucking her that you suddenly remember that you needed to pee. Not wanting to stop fucking, you let loose inside her. As your piss flows freely into her womb, she pulls back and smiles at you.

"I didn't know you liked piss-sex."

"Neither did I." You laugh softly as you continue to fuck her while filling her up with piss. After a few minutes, you cum hard replacing some of your piss with cum. You don't pull out immediately as you bask in the after glow of the fucking. Your sister writes her number on your penis in permanent ink and slaps your butt as she pulls out of your pussy. You smirk and smack her ass as you pull out of hirs. You don't know when exactly you both grew parts from the other, but you really don't mind. You both figure it means you can fuck more people as you have the equipment needed regardless of their preferences.