Damn, how could I have been so stupid, foolish?They had been fucking for over thirty minutes. Was this a man or machine? Was he ever going to cum? Wou...ld Suzy survive? I was seriously concerned.Then, Suzy screamed that she was close. They both increased their speed and strength of fucking. I couldn't believe it. How could they fuck so hard? My heart was heavy. I didn't know what to do. Suzy suddenly screamed again, and wrapped her arms and legs even tighter about his black body. She was arching. We walked hand in hand and talk just naturally progressed to the night before and the way whilst having sex the dirty talk had been about seeing each other with somebody else and what we would do.“Shall we do it? If we are going to do it for real I want to do it before I get too old and flabby” was all she said.I readily agreed but then came the difficult problem of how do we start? How actually do you get into swinging? What is the etiquette, just how do you go about meeting other people for. I so wished it was me. He started kissing down to her tits. She was squirming slightly as she played with his hair. I saw him sucking and kissing her tits. My pussy was so wet watching, I began to rub it slightly. He opened her robe all the way and now was kissing his way down. Her knees came up and then put them wide open. I had never seen a man do this to a girl,… live. It was making me so hot to watch. I found my fingers were rubbing my slit, up and down. I saw his head now between her legs. She didn’t object to the French kiss that contained our mixed juices, which coated my tongue, lips, and cheeks. We moved in slow motion, Karla tightening her muscles as I pushed forward, and loosening them as I pulled back. Once again she had a crushing orgasm as my cum splashed into her. She went limp again, and I put my head on the pillow next to hers.When her breathing and pulse returned to normal, I kissed her and began the entire sequence again. I feasted on her small breasts, drank deeply.