Satan's Mistress (1982)
Satan's Mistress is a 1982 horror movie directed by James Polakof, with a running time of 1h 38m. It stars Britt Ekland, Lana Wood and Kabir Bedi.
A woman in an unhappy marriage finds sexual fulfillment in her relationship with a ghostly, speechless presence who, obviously, doesn't quite say who he is.