Le Bon Plaisir

Le Bon Plaisir is a 1984 French film directed by Francis Girod. The film relates the story of the efforts of a President of the French Republic JeanLouis Trintignant informed after a number of years of the existence of a son born from an extramarital relationship with Claire, a former mistress Catherine Deneuve and using the secret services to cover up any kind of proof likely to tarnish his reputation.

Source: Wikipedia