Macu, the Policeman's Woman (1987)

Based on a real-life murder case, chiefly narrated by Macu in flashbacks. Ismael Ramírez is a middle-aged police captain who falls in love with 8-year-old Macu. Her mother agrees to their relationship, knowing the privileges to be gained from having a member of the police force in the family. They are married when Macu is eleven and he impregnates her twice. Years later, Macu falls in love with Simón, an adolescent her own age. Ismael's jealousy leads to murder.