The original title of the film is Le souffle au coeur.

Very strange little movie. Quite remarkable how Louis Malle such a gross incestuous premise, add an adolescent protagonist who does a lot of icky things, and turn it into something so emotionally tender and sort of touching. There's a romantic wistfulness throughout that I remember from my limited past experience with Malle's other work and it continues to hook me emotionally.

This film is about an incestuous relationship.