I held out my hand for the phone and gently caressed her hand in the exchange and thanked her. The Captain reported that the patrol craft were nearing...completion and asked what arrangements had been mare for the armaments. Rather than taking on the design of the laser cannons, I had farmed out their design, construction and installation to CS&S so provided him a contact. The only specifications provided to the contractor were that were to be two cannon in a common mount whose impact point could. I knew you were lubing it up and putting it on. I was unconsciously arching my back upwards searching for what I knew was to come. Whimpering pitifully as the sheets grazed my cock, every nerve heightened and threatening to make me cum uncontrollably.I felt your bed shift as you positioned yourself. I tensed slightly as your inner thighs touched the outside of my thighs. You leaned forward, your hands on my shoulders bracing yourself. The cool slippery tip of the toy you chose to wear. " You mean like doing both of you? Wow, just like we fantasized about, a threesome. I thought you were just kidding about that Karen." Derrick, don't talk about that in front of her. I mean it was just play talk, besides I meant me, you and another guy. Certainly not with my sister."Derrick was enjoying playing with both of them about this and began coming up with different ideas as a joke. "Hey how about this. Kathy can watch for a while, and when you can't go anymore, she jumps in. How's. I’ve had my fair share of sexual experiences in these showers and while I don’t think one would ever get caught ... the idea of getting caught adds to how hot it is. When I first started hooking up with the Married Guy he said that hooking up in the change rooms was pretty high on his sexual bucket list and we have done it twice. So, when he told me to go in the change rooms and wait for me I didn’t need to be told twice.As expected, there was nobody in the change rooms, I went to the end.