I got to do a bit of hardware, and a bit of software. Nat was working on a pure software project that involved evolving controllers for robots in a vi...tual environment. We tinkered away at our respective projects for an hour or so then made a move to get home for dinner.In later years we would be working on projects in teams. I hoped that Nat and I could work together, as I had a feeling the two of us together with our complimentary skill sets would be good. Nat was a hacker. She would put. He told me you were fantastic in bed and with a bit more training I would be almost as good.I was already aware of her performance with Tom. She had nearly killed him she was so eager to engage in anything he wanted and he told me she was like a 16yo girl who had just found sex and wanted it non stop. He said he was more than happy and would be seeing her again. I nevr let on to her he had spoken to me.I said I hope you don’t dominate him too much – we all enjoy it with him as well. She said. The shower curtain was being slowly inched open on one side, and I heard more soft giggles. To my amazement, I didn't try to yell at them or cover my dick with my hands. I had a nice dark tan from the long summer of sports, a fairly muscular frame, and I was not ashamed of the flaccid size of my cock. Quite the opposite, in fact. When I had an erection, I admired the curve and protruding veins along the shaft. The base was thicker and just tapered slightly down towards the head. My cock quickly. Her shorts became open as she lay on her stomach with her legs in the air open right in my view.I could clearly see the red thong string trapped between her cunt lips which were nice n thick and very exposed.My cock was damn near busting out of my boardies so I reached in and began to rub myself while taking in this private show her sister was giving me.She then stood up after about 7-8 minutes of torchering me and slowly turned and announced she needed a shower.She saw my hand hiding in my.