The race was Master William’s by default.The first race in the second round was Mistress Joan and mare against Master David and cumslut. It was a ve...y close race but Master David won by a few feet. The second race was Mistress Anne and cowgirl against Master William and toni. Despite the fact that Master William whipped toni mercilessly trying to get more speed out of her, Mistress Anne and cowgirl won by well over a length.“Our final race,” Frank announced loudly, “will be a full mile. That’s. "Oh, was it. When they finished, they asked us if we wanted to got on the bed with them and have sex. I don't think I've ever been more turned-on in my life. They watched us fuck twice, I was fully on the pill by then and that started us doing it in Mom and Dad's room next to them."Well, it wasn't long before our mom, she was the one that brought it up, asked if we wanted to trade partners. Danny and I looked at each other, remember, we'd seen them naked and fucking a number of times by now,. I lifted my head and took one of Mary's nipples into my mouth, teasing it with my tongue until it stood firm and erect. Then I did the same to her other nipple. Mary lifted herself off of me and reached between her thighs. She grabbed my cock and guided it into her tight pussy as she lowered herself on it. Then she placed her hands on my chest and began rocking back and forth. I reached for her breasts, captured them and massaged them as she rode me. Mary began moving faster and I began moving. Now we were all done peeing, and were standing there naked.Kyle and Kelly must have been wondering what would happen next. I could tell they were both excited, and in their own very young way, horny. "Do you guys want to have some fun?" I asked, and both their faces lit up as they said in unison, "Oh yes." I had Kelly lie down on the grass, and told her to spread her legs wide open. I wanted to try what I had seen pictures of in those dirty comics at my friend's house. I had Kyle lie down.