” I said as I stood up, my cock still in Katie’s mouth. She pulled my cock out of her mouth and looked up at me in shock, “You want to fuck your...sister?” she asked. Before I could say anything my sister stood up and said, “I told you I’ve had a big cock all week.” Katie stood up with her mouth hung open in shock. “You mean you have been fucking your brother all week?” she asked, almost screamed. My sister nodded and smiled at her. “Do you blame me? I mean look at the size of that cock and I. " Yeah, well, we do make more than the average kid working after school, but we still have to pay expenses and stuff. We have so much crap to set up and take down we have to hire kids to help us." Well I'll help for free." Hah! I'll hold you to that. I'll make Matt put you to work! Really though, I think we're showing up with the truck around six-thirty at the gym at our school Friday if you want to come." Sure! It actually sounds like fun. I'm not sure if I'm going to be a groupie, or what do. “Oh you are a naughty boy!” you say with a smirk on your face. We make out some more before I pull away and say“You are going to be my little slut today aren’t you?” “Yes” you say the excitement obvious from your voice. “Yes what?” I say playfully slapping your ass.“Yes master.” “That’s a good girl. Now lay on my bed and get into a spread eagle position”. Like the good little slut you are, you dutifully lay down and spread your legs. “Good now hold your lips open so I can see all of you”“Yes. And then, slowly, and very, very hesitantly, Jasonreached down for his cock too and began to masturbate too.When both of them were erect - it had been a bit of an effort, I think, asit had taken some time and they were both breathing hard - I told them tostand facing each other and then to move forward until the tip of one cocktouched the belly of the other man - the one to touch first would be thelonger.They shuffled forward again, and once more had a hand on each other'sshoulder - now a bit.