Lianna (1983)

Lianna's life is a succession of domestic errands and boring faculty parties, however her heaviest cross to bear is dealing with her waning marriage to Dick. In order to find intellectual stimulus, Lianna takes a college extension child-psychology course taught by Ruth. When Lianna catches Dick having an affair with a young coed, she finds comfort and eventually true love in the arms of Ruth. However, this comes with a price as everything in her life is turned upside down.