I did not do exactly as instructed, stealing a few quick glances every little now and then, to catch my mom leaning against the old man on his bed, st...roking his cock and sucking on it, alternating with twirling her tongue around the huge crimson cockhead while he had his hand under her top and obviously playing with her tits (she was rather slender, with C cups I found out later) until he shot some white liquid which she took in her mouth. Afterward, they got up, he adjusting his pants and her. Mom was next to me.My mind began to wonder. Her back was facing me. I peeked under the covers, Damn she was naked. Instant Woody. I'm a 15-year-old male. My male hormones are raging anyway. I moved closer to her and laid my hand on her butt cheeks. She didn't move. (Should I get braver i asked myself) I lay quiet slowly beating off. I moved and laid my hand over her waist. Again she didn't move. (She was still sleeping) Moving right up against her warm body. She didn't move. I touched her. I was holding my cock in hard and deep, grinding against her clit as she clutched me tighter to her, shuddering under me. I started to finally come to my senses again, and realized I was looking down into her eyes. Her face was flushed and sweating, tears dripping out of the corner of her eyes, panting like she had just tried to compete against me in a three mile race. I swallowed, my mouth was dry and I croaked “Mandy, are you OK?”She swallowed herself, and nodded. Her hands released my back. "When we had more than a little wine she asked how you were in bed. I thought it an odd question but then she and I always talked about the boys we dated back when we were still in high school." I asked, "So what did you say to her Melody?" I didn't want this conversation, but I was aroused by the knowledge the sisters had been talking about me. I realized that maybe I wasn't in trouble when Melody grinned and said, "I told her you were a GREAT lover." Melody went on, "We drank some more.