Bonnie’s Kids (1972)

Sisters Myra (Robin Mattson) and Ellie (Tiffany Bolling) have finally had enough of their miserable, dead-end lives. When their step-father Charley (Leo Gordon) (The Bonnie from the title being long dead) tried to rape Myra, Ellie ventilates him with a shotgun and the pair run off to their wealthy uncle’s mansion in El Paso. From that point on, the two undergo a transformation in their personalities and start to enjoy living their lives on the wild side. Also with Scott Brady and Sharon Gless.