This happened over 20 years ago but is still clear in my mind. My wife and I were in our first years of marriage and we hung out with one of my single buddies often. My wife thought he was cute and the two of them did their share of flirting. One night during sex I asked her if she wanted to fuck Bob, she said only if I let her. We kidded about it for awhile and their flirting got a little juicier. One night I came home drunk around Christmas and pretty much passed out. Bob happened to show up and she told me the next day he helped her get me to bed, one thing led to another and she sucked and fucked him twice while I slept. Oddly enough I was turned on a little and had her give me the details while we had sex. Bob and I went to high school together and I knew he was fairly well endowed and she was turned on that his balls slapped her ass once he was deep enough.

Fast forward to summer and a group of us were camping, my wife and I were sharing Bobs dad's rv which had twin beds. That night around the fire we were all getting pretty lit and I headed to bed. I felt my wife climb in with me then woke up and realized Bob was kneeling next to her making out. She knew I was awake but he didn't, he tugged at her a little and flopped on his bed which was directly across from ours. I whispered to go for it if she wanted so she rolled out, they kissed a little and she worked her way down to suck his cock. I drifted in and out but woke up to what I realized was the sound of his balls slapping her ass. I heard her cum several times then I could tell he exploded inside her and collapsed. After a few minutes he rolled off and she crawled back in with me. I was rock hard and slipped into her soaked pussy and filled her up again quickly. We all passed out and there was a little awkwardness in the morning when we all woke up naked but we got over it, cleaned up and got into the day.

Our relationship was pretty open after that, I was working a lot and some nights Bob was over, I couldn't stay awake and my wife always told me what happened the next day, oftentimes he would get up to leave she would end up giving him a blowjob before he got out the door. He eventually got a steady girlfriend and married, ending their fun. I always wished for a threesome but it didn't happen until our next FB which is another story.