Mr. Cock is knocking on the door, I guess I have to open up and let him in." I tilted my hips and ground my rapidly dilating cervix onto his cock-knob... He got the idea and gave a big shove, working it deep inside my womb, where the business end of all big cocks belong. Again I popped my cork. This was making me delirious with pleasure. I felt another wave of jealously that the girl had been getting this all day long."Oh, shit! That's a big one you have there! I bet you could make a mare cum. Scott got naked and rinsed himself off, as well. We put our wet clothes back on, which felt good on such a hot July day, and finished our playing in the woods until supper time.The next morning was met with anticipation from both of us. We went to the tree house to talk about the day before, and the week before. We both affirmed that we liked both the peeing and the sex play. Scott must have been watching something about porn the night before, because he had an idea to try. We both got totally. " I'm not tired." Who said anything about sleeping. You didn't let me finish," said Rachel. "I was going to suggest that you take Robbie with you. I'm sure you could find something to do." Rachel!" What's wrong, Robbie?" I'm not going upstairs for that, thank you very much," said Karen."Well if you don't want him," said Rachel. "I might just take him upstairs and bonk him myself. You wouldn't mind would you, hon?" As long as I get to stay here and bonk Karen's brains out." That's settled then,". I showered and to the living room, I found both girls sitting around nude. They just looked me, then looked at each other and started giggling. We had some early morning sex that was awesome.I didn’t want to, but I had to go out and take care of some things. I knew the girls still needed and education, so I did some research for home schooling stuff. I found I could order everything I need from my online account at home. .