
Unfaithful is a 2002 American erotic drama film directed by Adrian Lyne, and adapted by Alvin Sargent and William Broyles Jr. from the French film The Unfaithful Wife (La Femme infidèle) by Claude Chabrol. It is about a couple living in the suburbs of New York City whose marriage goes dangerously awry when she indulges in an adulterous fling with a stranger she randomly encounters in Manhattan.