Hope somebody can help me out with finding a story. This was one of the first ones I've ever read and I can't for the life of me remember where I found it.

I'm 90% sure it's about a couple that goes on vacation, but the wife ends up cheating on the husband with someone they meet there. At one point the husband is super drunk at the bar and goes into the washroom and hears people having sex in the bathroom stall, he's too drunk to realize it's his wife, but he even bangs on the door and tells them to get a room. Later on he's pretty sure he sees her with the other guy in the ocean and thinks they're having sex, but again isn't sure.

Not sure how much that helps.

On that note, I'd also love any recommendations for something similar, where wife/gf cheats and is either caught by the husband in the act, or he's drunk/ passed out but can vaguely tell that somethings going on.

Many thanks!