Kathy answered him with the same furious frenzy, wrapping her legs around his back and locked her ankles tightly together. She worked on his hard cock... milking it with her slick cuntal walls. Joe had taught her how to use her snatch. Kathy prided herself on her cuntal acrobatics. She had a cunt that was like an experienced set of hands. She knew just how to pull and suck at a man's cock--when to tighten, when to slacken, and finally when to pull and tug at the pounding prick when she wanted to. He slid out of my ass and in again, the movement continuing for a long time. Having had sex several times during the previous hours I was a bit sore, but the feelings of pleasure welling up inside me overshadowed every sense of discomfort. All that filled my mind was him fucking me, a guy and a girl sharing the wonders of evolution. There was only a tiny part of me that still held on to the notion of being a boy. A small speck of conscience far in the back of my head told me that this was wrong. And told us it was time for lunch. In a place by the campus but quite unlike any university cafe I'd ever come across. Well, almost as informal but the food was in a different league. And both Seff and Beate were quite assiduous in swatting either of us– and not lightly, either– if we showed signs of lapsing into tech speak.In the afternoon, talk turned more towards to the business end of things– we clearly already had ideas we could collaborate on– and that involved the four of us more. …” I’m just looking at her in shock. I made her cum, me Billy the Kid, made this grown woman have an orgasm. She collapses on me, drooling a bit on my chest, my cock still hard inside her, and I’m enjoying the little ripples of her pussy. I kiss the top of her head. After a minute or two she looks up and me and asks me what the matter is. “Didn’t you enjoy that?” she questions me. I reassure her that I did, and hint that I didn’t have the finish that she did. “Oh sorry babe” she apologises, and.