My wife and I rented a cottage in Jamestown,NY a few years ago and went to a dance in town, where we met a nice guy. My wife danced with him and they got along great, so we invited him back to the cottage for a few drinks. Well, with some drinks into us, and me starting a sexual conversation, things started to turn into sexual petting, kissing, and kibitzing about. I knew that my wife wanted to fuck him, so I suggested he stay the night in the spare bedroom instead of driving home late at night. He readily agreed.
We partied some more with dancing and drinking and then the 3 of us settled onto the couch where we proceeded to take my wife's clothes off. She then took our clothes off and sat between us and stroked our cocks, one in each hand. From there, I left the couch and the two of them fucked until they both had a climax.
By then we were tired so I suggested my wife sleep with the guy in the spare bedroom instead of sleeping with me. I am a light sleeper so it was a HUGE turn-on for me when I heard their bed squeaking later in the night. I was imaging her with her lags wide apart getting fucked good. I peeked into their room and sure enough, she had her legs wide apart and was kissing him passionately while he was pumping her. They didn't even know I was watching.
I went back to my bed and in the morning while I was making coffee for us, they had one more fling before dressing and coming into the kitchen. What a satisfied look on my wife's face! I still get hard thinking about how I spied on them that night.