About 4 months after we got married, my husband and I were waiting to pull out of a parking lot when he sort of looked at me out of the corner of his eye and said "So, you know, what would you think if I asked you to do a threesome with me? There'd be, you know, all sorts of rules, and we wouldn't actually have sex, just the three of us, you know, pleasuring *mutter mutter*... well, what would you think?" We had had a long discussion several weeks before about fantasies, and this had come up, and I guess I had been open enough that he thought we might be able to act out some of them. I told him I wasn't too sure, but I was intrigued, so I asked him to talk to me again in a few days. He did, we talked, and set up all of our "rules" for the night, and then he popped the bad part... the girl he wanted to include. He had met her during the year of our engagement, while we were living in different states, so he knew her more than I did, and said she was trustworthy, so I went along. We talked to her about it and she actually agreed. (He was pretty certain she would, I had no idea whether yes or "hell no" would be the answer.) I do have to say, I got two amazing nights out of it: the first when I agreed that I'd do it (probably the most romantic "thank you" sex he's ever initiated ), and then the night it actually happened. I got a little bit nervous, but his fantasy was basically twofold: first, having himself and another woman being completely at *my* command, and then having us turn the tables on him and sort of dominatrixing him (is that a word? it is now *rawr*). She was a bit of an accessory, and knew it going in, so I really had no reason to let jealousy make me so nervous. Now the bad stuff... In a committed relationship, a threesome is VERY hard to pull off successfully - not the actual planning or execution, but the aftermath. To make a long story short, I managed to convince myself that he had fixated on her, even though she got into a relationship a couple of weeks after we had our FFM. This jealousy on my part nearly tore the marriage apart, and my husband lost his friend. We went through a very rocky period of nearly a year because I was almost always mad at him at the back of my mind, for the feelings I assumed he still had for this girl. We finally finally finally talked about it, and resolved the issues that it had brought up. So to sum it up: It really was like "vacation sex," almost a gift from me to my husband for playing out his longtime fantasy. married + threesome = good thing ONLY if you are not the least bit the jealous type. otherwise, married + threesome = AWFUL.