Go visit the hospital

You think about your younger sister Susie in the hospital. In high school she did fine with regular doses from her boyfriend, Carl, as well as doses from you and your family, since family wasn't cheating. Especially the way mom made you do it.

After graduating high school and moving in with her boyfriend the family doses stopped and Carl was supposed to pick up the slack. I guess you can only reject free sex from almost any girl on the planet for so long and her intake dipped more. We noticed her mental decline and donated when we could, but after a fight a couple of weeks ago caused several days without a dose, she had to be rushed to the hospital. Carl moved out the same day.

They're feeding her doses through a tube now, but medical donations became harder to come by when the taboos on sex lifted, so she can use what she can get.

You play with yourself thinking of the blowjobs Susie used to give you. You weren't allowed to touch her, much less fuck her, while she extracted her medical doses. Your mother would yell at you if you even thrusted too much as you came in her mouth. The other guys would tell stories of all sorts of fun things they got to do with their sisters, but you only received very clinical blowjobs. Usually while fantasizing about doing all the fun things you heard about that day.

As such her ass had become the holy grail to you. It became an obsession all through high school, even as you did whatever you wanted to the other girls, you couldn't stop thinking about the one ass you couldn't have. Her blowing you every night was almost insult to injury.

You think about all the things you still want to do to Susie's ass and you're hard as a rock. You look down at your erection. Gotta save this one for Susie!

You stand up, put on your cleanest smelling t shirt and tuck your erection into a pair or loose jeans. Commando. You go out the door and promptly slip, falling on your ass in a puddle of piss outside the door where the Piss Piggy once was. A small amount soaks into the ass of your pants.

Shit. You stand up quickly trying to act like nothing happened and try to rub your sore ass, wincing when your hand comes back damp.

Well, you think. What now?