The Grownup is a short psychological thriller that blends horror, suspense, and dark humor. The story follows a young woman who makes a living as a fake psychic, scamming desperate clients with her so-called supernatural abilities. One day, she meets Susan Burke, a wealthy woman who believes her Victorian home is haunted and that her stepson, Miles, is possessed by something evil.
As the narrator investigates the eerie house, she begins to question whether there is actually a sinister presence—or if Susan and Miles are hiding dark secrets of their own. The tension builds as reality blurs with paranoia, leading to unexpected twists and a chilling, ambiguous ending.
With its sharp writing, unreliable narrator, and psychological depth, The Grownup is a gripping, quick read that keeps readers on edge, proving once again Flynn’s mastery of dark, twisted storytelling.