Consenting Adults

Consenting Adults is a movie starring Kevin Kline, Mary Elizabeth Mastrantonio, and Kevin Spacey. During a joint dinner at the restaurant, the neighbors offer to exchange wives for one night. It was a joke, but only at first.
Richard and Priscilla Parker are an ordinary suburban couple whose lives are invaded and rocked by their hedonistic, secretive new neighbors, Eddy and Kay Otis.