Historically, cinema relied on folklore tropes (Cinderella, Snow White). The stepmother was a villain, representing an interloper who threatens the protagonist’s happiness.
For decades, the cinematic family was a nuclear fortress: two parents, 2.5 children, a dog, and a white picket fence. Conflict was external (the monster under the bed) or safely rebellious (the teenager who borrowed the car without permission). But the American household has changed. According to the Pew Research Center, 16% of children in the U.S. live in a blended family—a household comprising a stepparent, stepsiblings, or half-siblings. Yet, for a long time, Hollywood refused to look inside these new walls.