Joseph W. Sarno - Confessions of a Young American Housewife (1974)

Carol is a young happily married New Yorker, who enjoys being part of a swinging foursome with her husband and a befriended couple. One day Carol's widowed mother comes to stay in their house, but she is more on the conservative side and doesn't know about her partner-swapping daughter. Could she ever open up to this sexually open lifestyle?

Starring: Rebecca Brooke, Jennifer Welles, Chris Jordan, Eric Edwards, David Hausman, Lana Joyce, Erica Eaton & Arlana Blue.