As an adult in my early twenties, I lived with my mum and stepdad. One night, quite late on, they were having sex loudly and I asked them politely to be quiet. They didn't and just carried on. I moved out shortly after.
Another time, a few years ago, I went away with the two of them. They're both arseholes at time and very controlling. I've tried going NC but feel guilty each time. Anyway, this time in the holiday home, they had both ganged up on me, I had an argument with them, and I had ended up going to bed early because of it. About half an hour later they went to bed and started having sex really loudly, I could clearly hear the springs on the bed and lots of sex noises for an hour or so. It was awful. AIBU in thinking this was unacceptable? It's making me really hate my mum as I'm thinking about those instances a lot lately for some reason. Then I feel guilty as my mum helps me out at times very occasionally (not financially, just with other things).