AKA Twice a Woman
Laura (Bibi Andersson) has long been divorced from her theater-critic husband Alfred (Anthony Perkins), though they still see one another from time to time. One day, while working at the icon museum she directs, Laura strikes up a conversation with Sylvia (Sandra Dumas). The two take a shine to one another immediately, and soon they are in bed together. This begins to lead to problems, because Sylvia is young and still lives at home with her parents, who are beginning to suspect something has been going on. Ex-husband Alfred chimes in, saying that Laura should be more careful. By this time, Alfred and Sylvia have also become lovers, as Laura soon discovers.