Fake Disgust

"Tom, Fucking Ew," she blurted out. It sounded like it was the least convincing thing you have ever heard, right up there with "No, I don't want more icecream" and "I hate sex and never think about it ever." Jess was struggling. Her eyes kept shifting down your your cock in your loose shorts and the shirt you had actually seems to be making the problem worse, accentuating your rod instead of hiding it.

"What the fuck is it about Katie, anyway," your sister says and turns around so that she breaks eye contact with your dick. You breathe a sigh of relief and try to adjust the monster hanging down your leg as it struggles to break free from your pants. "Fuck, this whole place smells like sex," she says in a huff. You're in mid-adjustment and she spins around again.

"Are you cheating on Stephanie?" she confronts you directly. Your hand is still on your cock, and you're sure it looks like you're stroking your dick. Your sister's eyes lock on it and her phone goes off, her text message alert. She immediately flushes, her eyes still locked on your hand.

"Another one from Katie?"
"Fucking Christ, can't you..." You and your sister say over the top of each other. Your cock is just not going down.

"Look, can I...just..." she turns around and you try to make one final adjustment to your dick, but then you realize...