what spiritually important step does lily take at the end of chapter 8

That night, Lily writes a letter to T. Ray explaining her disdain for him. She writes an acrostic about how much of a horrible father he is. She then tears up the letter. She goes into the pink house to use the bathroom and then decides to pray to Mary. She asks to know what to do and for help so that Rosaleen can escape her criminal charges. She touches Mary’s heart and proclaims that Mary was her mother.