We were both laying on chaise lounges talking about our sexual experiences when she admitted she was still a virgin. She had done a lot of heavy petti...g but would not let it go any further. I was surprised mostly cause I knew the guys she dated. They were very popular and yet had fast reputations. She said she had never had an orgasm and wondered what it felt like. That’s when I stood up and volunteered to rub more oil on her back. As I rubbed the oil on her back my eyes began to wander down. Nothing compares to seeing my cock sliding in and out my sister's mouth. Which is why I wasn’t going to last long. Being high made the sensations more intense. As my breathing got heavier she gets up and grabs a towel from the bathroom. I guess she isn’t going to swallow. Oh well, can’t have everything. She resumed sucking, even more passionately now, cupping my balls, stroking, everything, as I held her head and made love to her mouth. This is too much, I started blowing my load. I didn’t tell. “Mmmmm,” Shelby murmured, her mouth stuffed full of my cock, but obviously enjoying my touch on her tits. She sank her mouth lower onto my cock, taking it deeper into her mouth, rubbing the head against the roof of her mouth while she sucked hard, her cheeks hollowing showing the amount of suction she was using on my cock. Shelby began to slowly move her mouth up and down the length of my cock, sucking hard as she progressively took me deeper into her mouth until I could feel the head of my. " I replied "We are going to take our time and do it right." She just giggled, grabbing the bar of soap and lathering me up. As we have found over time is that we required some special attention to critical parts of our bodies. So much so that she had me exploding all over her and the wall in no time at all. I had to hold on to the wall to keep from collapsing on the floor. When I had recovered enough I reciprocated washing her from head to toe. She also had a nice orgasm while I held her up in.