."Alright it's a bet but if I win you'll not only be cleaning our apartment for six months but you'll do it in nothing but your underwear... and I can... invite people over to watch you... deal?" Deal!" They sealed their wager with a toast of their sodas.Nine months later, on the second of June, their respective report cards arrived in the mail and the contest was over, well almost over, Caroline still had to pay off the bet.After they had compared grades she looked at the brother. "Look Mark,". I have the debit card that Mr. Delauter gave all of us when we turned sixteen but I take money out at the ATM and put it in a separate account that I set up as soon as I was legally allowed. Both of the girls have vehicles and Mark has his muscle car but I was not surprisingly forgotten about when it came time to get a vehicle. Doesn’t matter I don’t have anywhere to go so no need for the car and hassle. I still bus to school, I still get pushed around but I don’t talk about it or do anything.. I feel it wave after wave hit me washing over my whole body. I wipe the sweat out of my eyes. Its glistening off my tits as I am sent into extasy . My hips start going numb and I lose feeling in my legs but still I can feel my pussy pulsing on his dick. Johns dick get hard again and goes all the way in me. I am getting to weak to move but John grabs my hips and helps me and I still am cumming. I roll over my body slippery with sweat and mark slides up me and starts fucking me again. As soon as. He replied in the affirmative and Kristy held his hand and led him to the dance floor. For a little while, they danced with a distance apart from them, but after a couple songs, Sean Paul's "Get Busy" played on the soundtrack. At this point, Kristy began to shake her ass in front of Aaron, and began to grind her backside into his crotch to the beat of the music."Whoa, careful now," Aaron cautioned as she began to grind herself into him. "You are my step-sister, after all." I don't care," Kristy.