"Fifth," I said with a straight face.Robbie looked at me. "No, the world isn't that warped."I just smiled."Ladies!" I yelled about medium loud.Nobody ...paid any attention."Not like that," Stephy Ward said. "You got to do it like on the bus after a meet." She took a deep breath, "Get your butts over here!" she yelled at full volume.The girls all stopped talking and came over in front of us and sat down."See?" Stephy said looking at me.I patted her on the head, then looked at the group."For any of. . uuh, uuh, uuh," as this young thirteen-year old boy brought me to orgasm. I had to stifle my cry of ecstasy and in a minute, I whispered, "You really got me off great, Davie, you're a great lover but now I want this in me," as I put my hand around his dick.I stretched out on his bed, he crawled up between my legs, I rolled the condom on his cock, and he pushed inside me.It was really easy, I'd taken care of any obstructions with some masturbation with a friend's dildo last year and Davie's. I bolted down the hall to the upstairs bathroom because I really had to pee. When I got to the door it was closed, but only sunlight filtered out beneath it. I pushed the door open, stepped inside, and saw my sister, dripping wet, completely naked, drying her hair with a towel.I was stunned. I couldn't believe it. What was she doing there? She was supposed to be at volleyball practice! It hadn't occurred to me that with the school year winding down perhaps her extra-curricular activity had. So i quickly hurried to my room.I put on her underwear straight away as i entered my room and felt her wet panties soak into my pussy and my ass.I took off my bra and put on a slutty shirt she gave me that is baggy on that gave me a clear view of my boobs in the mirror as i stood there in these slutty cloths and see through wet panties.I went back to her room and put them back just in case she found out and maybe she might get wet in them again tonight.That night once we all went to bed, i.