Luna (1979)

While touring in Italy, a recently-widowed American opera singer has an incestuous relationship with her 15-year-old son to help him overcome his heroin addiction.

Director: Bernardo Bertolucci

Cast: Jill Clayburgh, Matthew Barry, Veronica Lazăr, Renato Salvatori, Fred Gwynne, Alida Valli, Elisabetta Campeti, Franco Citti