She took me to her room . We got undressed and I saw she wasn't wearing any underware . We both got into bed I layed ontop of her and pushed my prick ...nto her mouth . As she began sucking it she started massaging my balls , after sometime I took my cock out of her mouth and went lil back and spread her leg and I forced my cock inside her vagina . I started riding her slowly at first and then I started fucking her faster and harder . She started moaning . Our room was filled with moaning and. " Sarah gave my sister a strange look of incomprehension, then shrugged her shoulders a bit and made her way into the tent. It was a minute later that we heard her loud complaints."Geez, you guys! This sleeping bag's got cum stains in it, and it's soaking wet inside! I've got your juices smeared all over my panties!" Both of us had to giggle with the visualization of Sarah's predicament. "Jo, have you got an extra pair of panties I can borrow? I can't wear these ones home. My Mom would be. Early enough to help set up but not so early that his mom and sister got to pump him for information. The Robison’s loved Michael, they had known him since he was a sad eyed little boy who had moved down the street to live with his uncle. Michael’s uncle, Roger had been a good man and loved his sister’s kid but hadn’t known what to do with a child. Mary Robison had taken one look at the boy Nate brought home and done her best to incorporate him into her brood. Yep, she would want to know. It was made hotter by the fact that at that very minute I thought about my Puerto Rican girlfriend, who thought I was at home in bed, when in reality I as cumming inside someone who I didn’t even know.The orgasm seemed to linger, with more streams of cum than I remember producing up until that point in my life. Cathy screamed in pleasure as she felt it inside her, which was a huge turn on. Spent, I collapsed on top of her for a few moments, enjoying the feeling of my tender cock still enveloped.