Suddenly I felt something REALLY big banging into my stretched ass and I realize its his knot. He was trying to knot me. I thought god not that but he...kept hammering at my abused and stretched ass. He was opening me more and more. Then suddenly, I felt this HUGH baseball size thing go into my super stretched ass. I actually let out a howl. The guys were going wild cheering what a real bitch I was now. Someone said look at her little clitty its rock hard and leaking cum. Make sure and get lots. If you weren't my sister, I would..." You would what?" she said with a tease in her voice. She was in her bra and panties."Stop it Cici ... please?"She put on the red dress, pulling it down over her beautiful midriff. Her bra was showing. I pointed that out."So now, you want me to take off my bra in front of you. Are you some kind of a pervert big brother?"I looked away. "I think you are very pretty, but I have no right to tell you how I feel. It is not appropriate for a brother to say such. "Fuck I need to feel you stretching my ass so badly" He gasped as her hands drove him wild. In one swift motion she released his cock and pulled her fingers out, stood up and smacked him hard across the ass. "You just said the magic words" She giggled with an evil grin "I've got just the thing for you my little slut. Reaching over she flipped open the lid of the box next toher, pulling out a tube of lube and dropping it on the bed between his knees. as hard as he tried, he couldnt. Starting gently, he continued the kiss, gradually escalating it as he slipped a hand under her top. Still slowly, giving her plenty of time to object, he slid the hand up her body until he was cupping a bare breast, then a little later when he detected a change in her breathing and heartbeat, he ever so gently pulled on a nipple as his tongue danced with hers. Long moments later, he leaned back, not making any effort to conceal the exceedingly prominent bulge in his pants, knowing that she was.