Eva and Franklin’s son Kevin is, in a phrase, an evil little shit from his first breath. He shrieks in her face constantly as an infant. As a preschooler he refuses potty training, stays mute, fixes his mother with a stony stare, and acts out. He responds with filial affection to Franklin, but for Eva has nothing but contempt. She handles none of this well (at one point, she accidently breaks his arm), but Kevin’s thoroughgoing, ridiculous awfulness here kind of excuses all that. By the time he hits puberty (played by Ezra Miller), he has become almost a caricature of malignity, an irredeemable smirking imp with a terrible whim always at the ready. When Ramsay cuts to a shot of his little sister’s new pet guinea pig, it’s almost comical how clear it is what will happen next.