What is the main conflict in Nightwoods: A Novel by Charles Frazier?

Luce is a beautiful young woman who lives as a caretaker of an abandoned lodge. She has limited contact with other people, including her father who is a deputy in the area. Luce has no contact with her only sibling, Lily, other than letters. Luce's father, Lit, raised Luce and Lily from the time their mother left when they were very young children. When Luce receives word that Lily has been murdered by her husband, Bud, Luce agrees to take in Lily's twins, Dolores and Frank. She soon discovers the children have been traumatized; probably by witnessing their stepfather kill their mother and by his subsequent treatment of them. Bud is charged with murder but with the skillful maneuvering of his lawyer, he is not convicted.