Some Girls (1988)

Michael, a college student, visits his girlfriend Gabriella and her family for Christmas in Canada. When he gets there, she tells him that she doesn't love him any more. Michael attempts to see what is happening. Meanwhile, her family is exceedingly strange: her father is an atheist writer who spends most of his time wandering the house nude. Her mother is a devout Catholic who bears eccentricities of her own. The sisters along with Michael visit their grandmother at a mental institution, where she mistakes Michael for her dead husband. Meanwhile Gabriella's sisters express interest in him. Granny escapes the hospital and heads back to her home in the woods, and the family chases after her, and Michael is kept reeling.