The Secret Life of an American Wife (1968)

A bored housewife poses as a call girl for a movie star sex-symbol, hoping she can prove to her husband, the star's agent, that she is still desirable to other men and thereby, rekindle the spark in their marriage.

Directed by: George Axelrod

Starring: Walter Matthau, Anne Jackson, Patrick O'Neal, Edy Williams, Richard Bull, Paul Napier

Links: IMDb, Movie posters, Movie stills