"Yeah." What's wrong?" Abby and I have decided to, uh, stop." Stop what?" Everything?" What? Why?" I explained our reasons.Her reaction surprised me. ... expected Izzy to be saddened for us, but instead she seemed genuinely angry."What does it matter to you?" You guys were awesome together!" It's what she'd said about us the week before, when she'd watched and even given us instructions when Abby and I gave each other oral sex. I started to get mad back at her. Were we just playthings to her,. She said I could have gotten in myself but I'd had to pull my skirt up so high that my panties would have shown. I said well damn I missed a chance to see them. She smiled and said you get another chance later.I had told her to be sure and wear comfortable shoes because of all the walking. She had on a white pair of tennis shoes and footie Sox with pink balls on the hill. As we drove to the park I kept stealing peeks at her beautiful crossed legs. She must have noticed because she asked me if I. ..I thought Brett must've known how I was feeling, because he began subtly moving my hand lightly over his erection. In the beginning it wasn't noticeable at all, but as the night went on, he was really working my hand. Damn, was he hard. His cock was stiff as a board. He was also shifting constantly, so he must've been throbbing. And this thong was really getting me all hot and bothered. But we couldn't do anything now. Although I was feeling hot myself, where would we go?Nicole was soon up. Despite the shock, he could feel his cock getting hard as Michelle pushed him against one of the bathroom walls and started to kiss him. Her tongue instantly pushed its way into her brother’s mouth and began to swirl around his.Michelle broke the kiss and yanked off Jason’s towel, exposing his slightly larger than average seven-inch erection. A pleased look came to Michelle’s face.“Well, I guess I should start calling you not-so-little-brother from now on,” she said before reigniting the kiss.