Movie From the Past - Thriller: S2 E15 - An Attractive Family - 1962

Family that kills together seeks to stay together in style, by icing the heir of one of their victims, before she comes into her inheritance. If the heiress audits the books, she'll discover that the family has already blown her share of the estate. Her newlywed sister was backed off a cliff while having her photo snapped, so the younger sister is understandably leery of heights, but not of her very understanding new in-laws.