Yea, it was fun even though I never had any interest in MMF. I would prefer to not have another guy anywhere in the vicinity, lol. But I was willing to give it a shot because I find the wife quite hot, and we all got drunk enough together that I was up for it. At times, I was able to just focus on her and forget there was another guy there. At times he was talking too much and directing the action too much for my liking, "oh I can tell she's enjoying that... she really likes it if you do this..." etc.
But I guess I can see the appeal. Just seeing her enjoy it so much was hot. Also, it turned out they're both very friendly and cool people. I would want to hang out with them again even if there was no sex. Planning on doing it again.