But the other morning I couldn’t help but feel horny. Guess I’d been having a hot dream. I threw the sheets off and started to stroke my hardening cock, and every so often when Sis would walk by the doorway I’d get a little extra thrill. Our family is really open, as you may have guessed, and we’d always run around nude around the house. Our parents taught us that masturbation was natural and not a big deal, and certainly nothing to be ashamed of. So it didn’t bother me that the door was open and as Sis passed by the door she could look over and see me whacking off. As it turned out, she wasn’t interested, and never even looked into my room.
But I sure looked at her. Mom and Sis had great bodies, and they both always turned me on. Of course, both of them had known this since my early teens, when I couldn’t hide my reactions to them. They both graciously ignored my erections, for the most part. Once I got an erection while Mom was doing some housework, all that bending over and ass shaking while she buffed, polished, picked things up. I was sitting in the living room watching TV, and as it happened Baywatch came on just then. It was all too much for me, so I started to jerk off. When Mom noticed, she didn’t say anything, but she did sit down on the couch across from me and spread her legs wide, giving me a good view of her tits and pussy. She watched the TV show, only glancing at me as I masturbated, smiling once when our eyes met. When I started to get close to cumming she said, “please use a tissue honey”. Mom kept tissues everywhere since no one knew where the mood would strike Dad or Me. After I filled the tissue with sperm Mom just smiled, closed her legs, and walked up taking the wadded up cum tissue from me, saying, “let me take care of that messy thing for you sweetie”.
Anyhow, Sis was walking around getting ready, and at first she was nude, then after her shower she was in her cute bra & panties set. At one point she came into the hall dancing as she went, and paused to groove to a particularly good part of the song, treating me to a show of her dancing in her hot, sexy undies. That about pushed me over the edge, and I started looking about for the box of tissues Mom keeps stocked up on my bedside table.