The Affair (TV Movie 1995)
A black American soldier bangs a married English woman during World War II.
with sex scenes but no nudity
A Good Day to Have an Affair (2007)
Two housewives who meet their respective lover in the same motel become close friends.
A Summer in Portugal (2013) Ein Sommer in Portugal – Germany
A husband asks a friend to serve as tour guide for his wife in Portugal. He does so, and also bangs her in the process.