All Her Fault
All Her Fault (Universal International Studios)

All Her Fault Ending Explained: Lies, Deception, and a Mother’s Bold Revenge

All Her Fault, starring Sarah Snook, is a suspense-packed mystery that keeps viewers guessing at every turn. Based on Andrea Mara’s novel, the series follows Marissa Irvine, whose life is thrown into chaos when her son Milo disappears after a playdate that never existed. Across eight episodes, the show expertly blends psychological tension with domestic drama, exploring the strains of motherhood and the pressures of trying to maintain the perfect life.

Milo’s Disappearance Sparks Peter’s Lies, Carrie’s Threats, and Deadly Family Secrets

The disappearance of Milo sets off a series of shocking revelations. Carrie, later revealed as Josephine, confronts the Irvine family with a gun, leading to accidental death and heightened panic. This pivotal moment exposes long-hidden secrets and sets the stage for the story’s most explosive twists, keeping both Marissa and viewers on edge.

All Her Fault
All Her Fault (Universal International Studios)

Central to the thriller is Peter’s terrifying deception: after a car accident years earlier, he swapped his newborn son with Josephine’s child, creating a web of lies that endangers everyone around him. His manipulations escalate to violence, including the killing of Carrie’s father and the orchestrating a fake kidnapping of Milo. Peter’s actions drive the series’ tension and test the limits of Marissa’s trust and moral judgment.

Marissa Outwits Peter, Protects Milo, and Finds Justice While Reclaiming Her Agency

Marissa ultimately takes matters into her own hands, using her knowledge of Peter’s soy allergy to engineer his death while maintaining plausible deniability. This calculated move marks her transformation from a distressed mother to a strategic protector of her child, highlighting the series’ theme of women reclaiming agency in dangerous situations.

Detective Alcaras uncovers Peter’s baby-switching and manipulations but chooses not to arrest Marissa. In the final scenes, Marissa and Milo settle into a new home, finding peace and safety while reconnecting with her friend Jenny. The series closes with a sense of justice and closure, blending suspense, maternal instinct, and the triumph of resilience over deceit.