She mentioned to me one day that she was interested in possibly going to bed with him, if I wouldn't be upset. She thought he was pretty sexy, and we were all very familiar, and she wanted to try another man. Far from being upset, I approved wholeheartedly. She enjoys sex a great deal and expresses it loudly. I looked forward eagerly to seeing a new person turn her on, to watching another man explore her body and her desires, to watching her discover new excitement and pleasure with a new person. He and I certainly thought she was very sexy. She was cute, though not a beauty queen, but she had a terrific figure, medium height, thin, tight, tight hips and tight ass, slinky. And she just exuded sex when she wanted to.
Late the next spring, he came up for another weekend. There was a big party at the college that we all went to. She and I pooped out and left the party first, went back to the apartment to sleep. He said he'd be along later when the beer was gone.
An hour or so later, the doorbell rang. She got up to let him in, put on one of my shirts to cover herself. I guess I fell asleep again for a few minutes, woke up to find that she hadn't come back to bed. There were no lights on, and I didn't hear voices, so I wondered where they were. I got to the end of the hall and I could see them, just inside the front door, standing there kissing. They were kissing deeply, tongues busy, her arms were around his neck, one of his hands on her back. His other hand was between them, under the tail of the shirt, cupping her crotch. He was fingering her hard and deep. Her hips were rolling and pushing into his hand. She was moaning as they kissed. This was real, urgent sex, just standing up and using only a few appendages.
He noticed me standing there, my hand on my dick, whispered something into her ear. She turned around to see me, took his hand and led him to the bedroom. She had not buttoned the shirt to answer the door, so it slipped off easily to a puddle on the floor. He stripped off his clothes quickly, and lay down with her.