I gave her a pillow from the couch for her face and entered her to the hilt again. This point of view is my favorite because I can watch my cock disap...ear into her tight hole and contemplate what it might feel like to plow her tiny little pooh hole. As I fucked my sister from behind, she was very quiet accept for a few soft moans. I began to tickle her ass hole with my thumb and her moans grew louder. I sucked on my thumb and soaked it with spit then returning it to her hole. Still fucking her. Dr Nestry looked at Bonnie. “There are a lot of hormones swimming around in your system. Only some of them are involved with puberty.” Then he shook his head. “That’s not completely true. They’re all involved to a greater or lesser extent during puberty. This is one of the lesser ones.”“Is this condition hereditary?” I asked. “Are Bonnie and I likely to have this as well?”He shook his head at me. “This is a very rare condition. There’s no indication of a hereditary link.”“Okay,” I said. “What. How enjoyable it would be if he and I could sneak into the bathroom or the coatroom and have him fuck me while I was in my wedding dress. I thought how exciting it would be to sit in that chair as David removed my garter with my panties drenched with Derrick's cum, cum that would surely ooze from my pussy the remainder of the evening.At first I thought that once David and I were married and I was getting it every night, the desire for uncle Derrick would cease, but it didn't. Many times over. I re-assured him that it was something we all wanted, we are all adults, and I wouldnt ever tell his wife. That eased his mind. He thought I would be mad at him, but once he discovered that he had helped fulfill one of my fantasies and made Nicole feel good, he was more relaxed. The next night was without incident as we all still tired and hung over from the night before, but the following night, he wanted to go back into the spa to relax his leg muscles from the hike he and I took earlier that.