Homecoming with Sis

You and your sister have ended up at your parents place together, but they turned your bedrooms into a gym and a craft room, so the two of you are stuck sharing a little air mattress in the old playroom. Snuggled up at the end of the night, your sister starts asking if you remember...the games you two used to play. You try not to get too exci--those games have been masturbation material for your whole life--when you tell her yes, of course you do. You agree with her that the memories, though weird, aren't bad. You've never told anyone about it, but you're not ashamed. Smiling, she tells you she's glad she brought it up, and turns over to fall asleep. You try your best to do the same but you've got such a huge boner, after hearing her say she thinks about those little games fondly. You always have, but you've also masturba tons thinking about it...does that mean she does, too? You turn over to look at her, and she's wide awake, too. And wants to talk more. Not just talk, she wants to play a game. Truth or dare. God, you can't believe your doing this. She always was one for a dare. And she never, ever backed down. Still, you're nervous, shy, unsure. But you can't waste your one chance! You have to go for it. God, she's so gorgeous, smiling as she dares you to take it out. To touch her...to do everything you've spent years fantasizing about!