Gen started to stand up and I knew the moment was gone. She was going to leave. Then I felt a hand on my cock. She stood up just enough to grab my cock and pull it under her so that it was sticking between her legs. Then she lowered back down. Her pussy, only separated with her bikini bottoms was now resting on the top of the base of my cock, pushing it down and making it stick straight out. I was so unprepared for her to do that I didn’t get a chance to enjoy it. It was the first time she has wrapped her hands around my cock. Tod and Lisa were still at it across from us. You could see Lisa moving slightly up down forward back, ever so slightly. You could tell she was now grinding against Tod’s cock. Gen also started the same motion. Starting slowly and getting braver as she went. She was sliding herself along the length of my shaft, forward then back. She grabbed both of my hands and raised them to her tits now. I took both of her boobs into my hands and went to work on playing with them, then moving to her nipples which is what I knew she really wanted. With the increased water movement Tod and Lisa broke their kiss and looked back to us. They sat there starring at what we were doing, watching a sister grind on top of her brother’s cock while he played with her tits.
I looked Lisa in the eyes and smiled, I knew what I could give her that would make her wild. Then I said Gen, I dare you to lower yourself onto your brother’s cock. Without pause Gen took my cock in her right hand, pulled her suit to the side with the other and lowered herself onto my cock. As she lowered down I could feel her body shake and quiver with pleasure. I looked into Lisa’s eyes the entire time as my cock slid into Gen’s pussy. When she bottomed out she stopped and enjoyed it being inside her. She raised herself off me slowly and then lowered again. I moved my hands to her sides to better control her up and down movements. Lisa stood up off of Todd and crawled on the seat over to my side. She went right for my lips and started to kiss me. I couldn’t see much but I could feel it all. Gen continued to fuck me and Lisa was playing with my tongue. I could now feel Lisa being pushed into me as we kissed. I broke our kiss just long enough to look around her and see Todd had pulled her suit to the side and had buried his cock into my girlfriend. He was now fucking her doggy style while she kissed me.
I was pinching Gen’s nipples and she was picking up pace. She was getting close and I was likely going to cum first. Lisa whispered to me, please cum inside her pussy and with that I started to pump my cum deep inside her. As my eyes rolled to the back of my head I was listening to Tods balls slap onto Lisa’s ass as his cock was bottoming out inside her. With a sudden moan we knew he was now cumming inside her. Gen had climaxed sometime in the middle of my orgasm and now had fallen back into my lap fully pushing her weight into me, which was also pushing me deep into her still. I turned to Lisa and asked if she had cam, she responded I think at least 3 times.
The hot tub became silent as our heartbeats slowed down and the thumping quieted. That’s when I heard something off in the distance. I turned and looked in the direction of the house. There in the distance was our mom and dad. They were both fully clothed but my mom was slightly bent over and my dad was clearing fucking her from behind while they watched us. I was frozen in fear and confusion. Then I started to feel Gen grind her pussy into my cock ever so slightly.
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