Delit Mineur on AllMovie

Adultery and the possibility of patricide provide the motives behind this French drama, set in a Parisian suburb. Claire is in her earlier forties and is married to Claude, an alcoholic whom she once passionately loved. Together they have a young daughter and 15-year old Guillaume. Claire is having an affair with 24-year old Laurent whom she sees several times per week. Laurent's mother is Madeleine. She and Claire were once rivals for the formerly dashing Claude. Guillaume is an aficionado of detective novels and has a real affinity for detective work. He is well aware of his mother's shenanigans. Claude hasn't a clue. Then a local police inspector tells Claude the truth about his wife. Soon after, Claude is discovered dead. Apparently the cop had his own reasons for giving Claude the fatal news.