The Anniversary (1968), Roy Ward Baker

Bette Davis plays a wealthy one-eyed widow (complete with designer eye patch) who gathers her sons together once a year to celebrate the death of the husband she detested. Mama Davis couldn't be more castrating if her last name was Bobbitt: Her grown sons (it's been 10 years since daddy died) are essentially weaklings who seem to secretly covet the emotional stranglehold she has over them. When she can't exert her authority of her sons by normal means, Davis blackmails them with her knowledge of the skeletons in their closets -- and in the case of her eldest son, the women's undies in his dresser drawers.