Frank Finlay
Nino Rolfe
The Key is an Italian erotic film directed by Tinto Brass. Set in Venice under the fascist regime in the early months of 1940, it recounts a tale of a voluptuous woman in her forties who is unable to respond to her husband but undergoes a belated sexual awakening with her daughter's fiancé, which enables her to please her husband at last. imdb.com