After August told the detail of her mother to Lily. Lily thinks her mother doesn't love her. she was so angry and sad because she always think her mother loves her. when she knew is her mother left her and go to August's house. Her hope broke. it's terrible felling when your hope break. She will be mad at her mother because she loves her mother very much. 

  At the end, she forgive her mother because she realize her mother loves her but use the special way.