A challenge

"Alright" she said "such you're being such a baby, I've got an idea"

"Oh yeah? What?" I asked

"If you can make it through one whole porno with out touching yourself or cumming, you win, but if you so much as brush your hand against your boxers, or cum in your pants, I win" she said.

"You really think I'll cum in my pants?" I asked

"Dunno" she replied "I'm guessing you're really turned on already, that combined with the porno and maybe a little show from me might push you over the edge. Besides I don't know how much sled control you have, yet"

"Alright say I accept, what happens if I lose?"

My sister grinned at me "you stay naked for the rest of the weekend" she giggled

"What? The whole weekend?" I said

"Yeah, it's not that bad" she said "mom won't be back, we have the place to ourselves, it'll be fine"

"Okay, what if I win?" I asked

"I'll do your chores for the rest of the week" she said hopefully

"No way" I said "the only way I'll agree is if the forfeits are the same"

"B-but, but…" she thought for a moment "okay, fine" she said at last. "it won't matter though, I'm still gonna win. So you in?"