After the incident, Sophie saw their wolf cub in a different light. She felt very sorry for Lee for not having a loving mother like her. So, she no longer felt jealous when her mother gave Lee extra food, or combed his fur lovingly.
She realized her mother's love was enough for both of them. So, she didn't have to feel jealous. She and Lee had the best relationship after that day. She would even share her food with the wolf cub voluntarily or offer to comb his fur when she saw her mother busy.
Seeing Sophie change and show so much love and care for him, the wolf cub repaired her kindness tenfold. He never left her side and would even keep her warm with his warm fur during stormy nights or in the cold winter.