Deborah Kara Unger,Annabella Sciorra in Whispers In The Dark (1992)
A psychiatrist (Sciorra) is helping a patient who has a submissive and very satisfying sexual relationship with her lover. A new man the psychiatrist is seeing turns out to be her patient's lover. When someone is murdered, the psychiatrist must decide whether the lover is a homicidal maniac or someone she loves.