I dutifully complied. What does Sis have in mind for me now I thought! I went out to the porch and bowed before my sister/mistress who lay topless on ... lounge chair! Her small firm round breasts glistened in the sunlight! She was rubbing suntan oil all over hot body! Her brown puffy nipples grew stiff as she smiled at the growing bulge in my pants! She had me kneel before her & kiss her feet good morning! She sat up and spread her legs! She had on a pair of tight white panties she had from her. .. Say it all." I love your cock," I said as I felt my face flush."Then show me," he demanded.I opened my mouth, moved my head, and captured his penis. I felt it fill my mouth with a warm sensation as it massaged my tongue. I could feel the sensations all over my body. It wasn't just his cock in my mouth, it was a warm tingling everywhere. The sensation was a mixture of the nasty thing I was doing, the nasty thing I now shared with my mother, and the feeling of being overwhelmed and unable to. I returned the favor and we let our tongues duel at least for a full minute as our bodies pressed and we felt the passion build.Then we broke off the embrace and Kelly first knelt and then lay back on the cushions. I knelt and then lay beside her. I wrapped my arms around her again as we lay there for a moment just savoring the feeling of being with someone I loved in a situation like this. This was so much better than fumbling around on a hard bench in a gazebo with Elaine last year in the. Now Rob was going to take over some of the remainder of the evening and continue his relationship with them as their sexual instructor.Rob found Ashley to be especially sexy of the three girls there with him, naked, horny and eager for lots more sex play with him and he was noticing -- with each other. Ashley was the shortest of the three, and she had beautiful true blonde hair, a nice rack of breasts, and even though she was slightly on the chubby side, he thought she was totally hot. He.