Unfaithful is a 2002 American erotic thriller film produced and directed by Adrian Lyne and written by Alvin Sargent and William Broyles Jr., adapted from the Claude Chabrol film The Unfaithful Wife (1969). Starring Richard Gere, Diane Lane, Olivier Martinez, and Erik Per Sullivan, the film follows a couple (Lane and Gere) living in the suburbs of New York City whose marriage is jeopardized when the wife embarks on an affair with a stranger (Martinez) she encounters by chance.

Plot

Constance "Connie" and Edward Sumner live in upscale Westchester County, New York with their eight year old son, Charlie. Although their marriage is loving, it's horribly boring.