Art for Teachers of Children (1995)

Jennifer, an intelligent but insecure 14-year-old student at a boarding school, seduces her married dormitory counselor, a photographer who has offered to teach her about his art and winds up shooting her in the nude. She is naive, and he manipulates her into an affair that eventually is discovered. Years later, as the photographer is being investigated by the FBI, the adult woman remembers her first love as a case of herself watching the artist who watched her.

Imdb