Some Girls (1988) on Netflix

Plot summary

Michael, a college student, accepts an invitation from his girlfriend Gabriella to spend Christmas with her family in Quebec City, though she left college partway through the semester. At the airport he waits hours before she arrives. In the house he meets her family: her father, who is writing a treatise about Blaise Pascal, goes around nude; her mother is religious and quiet; Father Walter, a Catholic priest and a close friend of the family, is present; and Gabriella's sisters, Irenka and Simone, show romantic interest in him. Gabriella's grandmother, the family's matriarch, is ill in a care facility and takes Michael for her husband, long dead and also named Michael. Gabriella then tells him she no longer loves him.