I (M25) fucked my friend’s girlfriend next to him while he was passed out on the couch

My friend (25) his girlfriend (24) and I all went to a winery a couple months back. We relaxed, ate food and talked. But at one point, she tapped my foot. So I thought we were being playful and I tapped her back. This went on for a minute and we went on about our meal. At one point, I’d said something about how I wouldn’t make my wife work if she didn’t want to, that I would get two jobs if I must. “That’s a real man right there.” Was her immediate reaction, but again I thought it was all playful and fun. When we finally got back to their house that night she was still in her dress and I in my nicer pants and polo. Her Boyfriend smoked a massive amount of weed, but I didn’t since I had to get home. He eventually passed out while we were all watching tv, that’s when she made her move. She moved close and we started making out on the couch, softly she pulled down my pants and lifted her skirt. When she was on top of me, sliding into her was heaven, so tight and wet. It was quick, maybe 5 minutes of us trying to very calmly and quietly get it before he woke up. I dumped a huge load into her and she tightened up around me while we finished. Then after another 10 minutes to calm down I said my goodbyes and she woke him up and took him to bed. We have just pretended it didn’t happen but I can’t stop thinking about it.