Les ailes de la colombe (1981)

A mature lady approaches a young actor and offers him a great amount of money to get acquainted with her lonely daughter, who suffers of an incurable illness. Eventually a true romance emerges, as mother has secret feelings for the man, while he truly falls in love with the daughter. After the expected death of the daughter, the man leaves in grief rejecting the money, and the mature woman stays in deep loneliness, trying to cope with a double loss.