Uhhh, a bunch of stuff... but most recently came home drunk from a night out with my wife and her friend; wife went up to bed and I somehow ended up banging her friend (my cousin's wife) in our livingroom for well over an hour and made her squirt multiple times all over the couch, oops... I feel bad about that but also can't say I totally regret it. Even ate her our while fingering her ass, which made her cum pretty hard and squirt in my mouth lol.
Years ago I also went on a job interview and afterwards went out to dinner with the CEO and some of his friends, a couple of which were ladies. Ended up partying with one of the ladies after everyone else left and at some point, while we were at a club, she just leaned over and started making out with me. Then she drove me back to my hotel and I spent the night fucking her. It came out at some point that she was married, so maybe a hotwife? I then felt quite bad and broke up with my now wife, who I was dating at the time, because I felt like that was the only right thing to do after my infidelity... but then we got back together. Have never been very good at keeping away from one another despite the turbulence of our early dating life. Can't imagine being without her now though.
Recently found out she'd fucked a couple guys when we broke up for a bit before we married. I suspect there is still more to discover there and some of what she told me doesn't quite add up. Like she said she had a one-night stand and then started dating another guy but after thinking about what she told me, the details make it sound more like she had the one night stand while dating the other guy... which is just kind of extra naughty since she cheated on the dude she dated while we broke up lol. She also technically cheated on him with me since she fucked me the night I proposed to her and later found out, she only broke up with the other guy after I proposed. I strongly suspect there were more than two guys though. I find it funny she is so slow to divulge what she did when she knows it turns me on and it was all technically fair game since we'd broken up at the time and she knows I saw some people.