American movie. Definitely available in the US.
I just remember in one scene these bad guys (who were the main characters, making them sympathetic bad guys) break into some guy's house or hotel room. They tie up a husband and rape the wife, but the wife likes it because she's been getting tired of the husband anyway. Then the wife joins the bad guys. I want to say the rape happens in a bathroom. The guy is tied to the shower or a shower door I think, or he's tied to a chair.
I believe the movie is set in the same time period it was released, so sometime in the 80's or 90's or so.
Could that be a scene from True Romance? It probably came out around that time, but I sometimes get my movie scenes mixed up.