We set our alarm to wake us a couple hours earlier than our mom's usual time of getting up, so we can go back to our respectative rooms before mom get... up. It's been working so far, so why stop, right. It's a Saturday morning, and I wake up really early, a couple hours before dawn. I realize that Sara has cuddled up closer to me than usual & that my morning wood is now lodged in her ass crack. I kind of like the feel of my hard cock being in my sister's crack, so I begin to slowly and gently. As Jonathan sucked me, pulling against my cock and balls, Grace whispered in my ear that she and Julia really wanted to watch Jonathan and I fuck. I just knew that was going to happen at some point, so I crawled my way over to Jonathan's ass and gently rolled him over a touch as I started to rim him. Without knowing where I was going with it, he readily complied and lifted his ass up in the air, eager for me to continue. I did, moving my tongue around the soft pucker of his anus. Grace came. This may have been how she was used to dressing back home, and since I hadn't reacted like she expected, she didn't think anything would happen if she dressed this way while alone with me.Of course, there was also the possibility that she was testing me. By dressing the way she was, she could have been trying to find out whether or not I was as lowly and crude as the guys in class, or even if I would respond at all, thus disproving my denial of being gay. I simply didn't know what she was. " How the hell do I get that shit off?" You have to use body erase," I told her. "What the hell is that?" I'll show you," I replied, pulling her against me to rub my clay covered torso and breasts into her." It's not working," she said,"You're supposed to be lying down when you use it," I said, pushing her down to the plastic covered floor. "You can't use your hands, just body parts and you have to rub them together a lot."Do I need draw you a picture of that? Stomach to stomach, breast to.