I remember a movie where a couple first got together and started having sex as much as possible; There was a scene with them making love in a bathtub.
The boy ended up cheating on the girl and used the last of his condoms on this new girl. The girlfriend came home afterwards and wanted to make love. The boy tried to explain that there were no condoms left, but she remembered there was one left and proceeded to get into position. The boy didn’t know what to do, so he put on the used condom from earlier and tried to proceed, but the girl noticed and stopped him.
The movie ends with the couple not ending up together as she walks away from him in an airport.
I saw this movie on tv approximately in the early 2000’s. It was in English and in color.