Die Andere (1990)

In The Other Woman, Farou (Jean Rochetfort) is an author whose success is matched only by his lechery. During the rehearsal of his newest play, a scandal unfolds. Farou's wife Fanny (Anne Duperey) knows that during his "creative periods," Farou gets a particular itch that he can't resist scratching, but her own jealousy has finally reached the boiling point. It starts when Jane (Caroline Sihol), the deliciously sexy secretary that Farou has brought on as a live in assistant, falls in love with the artist.