Why delia hate her brother in the centipede?

In "The Centipede" by Ray Bradbury, Delia's hatred for her brother stems from a deep-seated emotional conflict and jealousy. She feels overshadowed by him and resents his perceived superiority, which fuels her animosity. The story explores themes of familial rivalry and the darker aspects of sibling relationships, highlighting how envy can lead to destructive feelings. Ultimately, Delia's intense emotions manifest in a violent confrontation that symbolizes the culmination of their toxic relationship.