The Sex Monster

Marty Barnes, a neurotic building contractor (Binder), convinces his reluctant wife Laura (Hemingway) to engage in a menage-a-trois with another woman. Things go horribly awry for him when he discovers that the experience has only wet her appetite for more, including Marty's secretary! Marty learns the powerful lesson that one should be careful what one wishes for, while trying to keep his wife in line at the same time. (official distributor synopsis)