A computer systems engineer, she worked for the Martian Government in the communications department. She had yet to find that special someone to marry...and have children with although, like most women her age, she was extremely passionate about sex."It's been a lot of fun fucking you two," Ken told them as they walked arm in arm out the door. He didn't offer to keep in touch with them because he really didn't want to, nor did they him, or each other for that matter. They were really nothing more. I could feel my pussy get so wet watching him fucking her so hard hearing her gasp and and moan fucking her harder and harder . I was so hot wanting to be her she is my age 18 he is 56 he was so sexy to me his cock filled his pants he was always rubbing against us as he would pass by us. sometimes he would stand behind me and grind his cock into my ass !! Damn her why her and not me !! I suddenly heard someone coming back into the office area . I quickly moved to grab my purse and leave . All. Gradually I drifted to sleep, my softened erection held inside Mom in a warm wet embrace.Sun from the window woke me. I was still spooning Mom, the tip of my penis still in her and my hand cupping her breast. I felt relaxed and very happy. Mom had shown me something new, making love. Marvelous. Wonderful. I wondered how much more I could learn."I think we're a bit wet."Mom's voice broke into my musings and, as she squeezed her vagina, my penis was ejected. Yup, we were wet."Can we shower. As I stammered to try and argue she shut me up saying, "You have finished your dinner go to the bathroom and get undressed I need a word with Janet". Still blushing I went off knowing it was useless to argue anymore.When I ventured out both of them were also naked, sitting on the edge of their double bed, immediately I felt stirrings in my groin at the sight of their large naked breasts. Janet giggled as Kathleen said, "We have decided to give you a choice David, you can come and lie on the bed.