To his room

You find that they have headed toward the rooms. What you don't realize is that as you walk your clothes are starting to dissolve. The main reason you don't notice is that with each inch of clothing you lose, you are also losing the memory of that inch. By the time you reach the guy's room, you no longer remember putting on any clothes this morning. You knock on the door and wait. A few moments later, the door opens and your sister invites you in. She seems to have forgotten to put on her bathing suit as well. She grabs your cock and pulls you into the room. The moment her hand touches your cock, you suddenly can't remember ever being straight or flaccid.

The room you enter is impressive. The guy walks out with a fairly impressive hard on preceding him. You start to drool when you see it. Your sister comes up behind you and whispers in your ear.

"Nice package huh, 'big' brother?"

Your cock shrinks by half when she says "big". Of course, you were always proud of having a relatively small cock. It was your proudest moment when one of the jocks in high school compared you to a cocktail weenie. You rarely even touched it as it was so small that, without a mirror , you had trouble finding your penis. Now it is so small, your balls cease to exist and your penis turns into your clit.