When Sally left Esperanza at a carnival, it is implied that she got sexually assaulted by clowns that were there. Esperanza became especially angry with Sally, because she didn't help or support her in any way.
Lucy and Rachel's baby sister had died, so they held a wake for her. There, three sisters came to Esperanza and made her make a wish. They also shared their wisdom and said that Esperanza will always come back for the people she left behind.
In the end, Esperanza became more aware of herself and will now express herself through her writing. She also acknowledged the fact that she wants to own the house of her dreams by herself, without someone else's help. But she will always come back for those she left behind.