"'Want anymore potatoes, Luke?' Mother offered that night at supper. 'Luke?' Her voice got more insistent. 'LUKE?' Luke jerked his attention back to his family... 'Er - no,' Luke said. 'No thanks. I've still got some.'"
Mother is getting angry with Luke
Mother is pushing at Luke to eat more; she thinks he is too
Luke ignores his mother
Luke is obsessed with his thoughts