I was in bed next to Barbie S. while she was fucking another man three times. The first was in Denver, CO. when my wife and I were swapping and fucking with the neighbor couple Jerry and Kitty across the street. The second time was in Fort Collins, CO. When Barb and I decided to have her join a 'Swinger Referral List' to find men to fuck her. That was the '30 something married man' that answered her ad and came home with her to fuck her in front of me while I was in bed next to them. He was the only one that would fuck in front of me while my wife was on the list. That was when we both agreed she'd go out on Saturday nights to try to find someone she wanted to fuck and bring home so I could watch with them not knowing I was there. The third was our ex brother in law, Toad. He was one that we almost swapped with he and her sister years before on the Fourth of July at their house in Loveland CO. before her sister Renee chickened out. Barbie and Toad were always attracted to each other but never really acted on it except the night I almost fucked Barb's sister and they were real close to fucking each other. Toad had just put his penis in Barb's pussy when her sister Renee stopped it. Toad was still friends with both of us, he came over to our house in Fort Collins CO. on a Friday night late. We were in bed, he needed to talk to me about something, I don't remember exactly what. We talked in the bedroom as I was in bed. He was getting ready to leave when Barb got out of bed in her nightgown and started kissing him in the doorway and rubbing the front of his jeans. She looked at me and asked if she could fuck him before he left. After I picked my jaw up off the floor, I said 'sure, go for it.' They came back and sat on the side of the bed and she undressed him while they made out, she took off her nightgown and they both got into bed by me. Toad went down on her and gave her a climax with his mouth, then slid up her body and entered her pussy and they started fucking. I was touching her leg as they fucked and could feel her tremble as she was approaching an orgasm. She came and he came in her right after. Barb rolled him on his back and started fucking him again, riding his returning erection. I could see his penis sliding in and out of her pussy as they fucked in this position, I ran my hand over her breasts and stomach feeling her shudder and twitch as they came to another climax . They fucked each other four times next to me, I know she came five, he came at least three times in her pussy. Toad got up to leave after an hour or so, Barb followed him and let him out the front door, came back to bed, gave me a big kiss and said 'thank you,' She then proceeded to fuck me and tell me how good he was and how it felt. That was the only time they ever fucked, and the last time I was next to her in bed with her when she fucked someone.