Love, Lust and Ecstasy (1981)

Ari can’t satisfy his wife Sara. He crashes his speedboat into a cliff and winds up in Switzerland for rehabilitation in what may or may not have been a suicide attempt. Alex, commissioned to paint Sara’s portrait by Ari, becomes Sara’s house guest and sex partner in Ari’s absence. Teresa, Ari’s secretary and ex-lover, is jealous of Sara’s relationship with Alex and schemes to break them up.