That Splendid November (1969) on Netflix

Plot summary

A few days after All Saints' Day, a large Sicilian clan meets at its country castle near Catania. The younger members of the family have long seen through the elegance and the strict morals around them, and seventeen-year-old Nino feels especially drawn to his beautiful aunt Cettina, whom the relatives treat as the black sheep of the family for a marriage they never fully approved of. The older woman, confident and sure of herself, encourages the passion she has stirred in the young man, who is awakening to desire. Their relationship stirs a great controversy in the traditional Sicilian society around them.