What is the conflict in the novel, The Discomfort of Evening?

The novel's main conflict is centered around guilt. Two days before Christmas, Jas starts fearing her father's plans to kill her rabbit for the holiday. That night she prays that God will take her older brother Matthies instead of the rabbit. The next day, Jas is horrified and guilty, when the vet appears with news of Matthies's drowning while skating.