90s thriller.
I swear I thought the actress was katie holmes, but it wasn't because i've checked all of her movies and it's none of them, but it must be an actress who resembles her. she is a compulsive cheating wife and there is a scene where her and her husband are at a fancy cocktail/chairty party and she asks a man there in the bathroom to 'f**k her quickly before my husband sees'.
Near the end I think the husband tries to kill her maybe, not sure but he definitely goes crazy.
I don't remember much else.