This is a moment of deep dehumanization. Although they’re just trying to be practical, Sheepa and Billy, perhaps dulled to the horror of overdose deaths, treat the girl as less than human. To May, their actions distance them from her, and prevent her from seeing even her brother as a deep and complex human. It’s important that May leaves when she realizes this—forced displacement is an evil repeated throughout the novel, but for May, voluntary relocation is essential to finding meaning in her life and preserving her sense of self.