The film’s conclusion hinges on a dramatic reversal of expectations, shifting the focus from the seemingly unstable Nina to her husband, Andrew. While the story initially frames Nina as the antagonist, the finale reveals that her erratic behavior was a calculated performance designed to protect herself and her daughter. Andrew is unmasked as the true villain, a controlling sadist who uses his wealth and societal standing to hide his abusive nature. His cruelty is rooted in a privileged upbringing defined by impossible standards, making him a symbol of the "toxic privilege" that allows powerful men to evade consequences. This revelation recontextualizes Nina’s cruelty toward Millie; she was not lashing out randomly, but rather engineering a situation where Andrew would target a new victim, giving Nina a chance to escape with her daughter.
The ending underscores the film’s thematic focus on solidarity among women in the face of systemic abuse. Millie is revealed to be the perfect pawn for Nina’s plan not because of her cleaning skills, but because of her history of fighting back against aggressors. When the two women finally unite, they succeed in destroying Andrew, with Millie delivering the fatal blow that ends his reign of terror. This victory is facilitated by a female police officer who recognizes Andrew's true nature, reinforcing the idea that the only way to overcome a system rigged by patriarchal power is for women to support one another. Andrew’s death is not just a plot twist, but a thematic statement about breaking the cycle of control.
Following Andrew’s demise, the aftermath provides a dark form of closure. Nina secures her freedom and financial independence, rewarding Millie for her pivotal role in the scheme. The story doesn't end with a simple "happily ever after," however; it pivots into a sequel setup that suggests Millie has found a new vocation. In the final moments, she interviews for a new housekeeping position where she learns the prospective employer is trapped with an abusive husband. Far from being deterred, Millie appears ready to step into the role of protector, signaling a future where she actively seeks out and eliminates abusive men. This transforms the character from a desperate victim into a vigilante figure, turning the concept of the "housemaid" into a cover for dismantling domestic predators.
