My Ex used to spend a lot of time over at our neighbors' house. The wife, Donna, was bi. They were swingers, and we were trying swinging at the time. So, Jimmy and Donna, and my wife and I used to do full swap on occasion. More often, my Ex used to go over during the day on her own. She told me about sharing Jimmy's cock with Donna, and Donna eating her pussy while she sucked Jimmy ... but she never said anything about her eating Donna's pussy.