Did Lou Ann change or did she remain the same throughout the book?

She changes.......

Lou Ann Ruiz

A transplant from Tug Fork, Kentucky who now lives in Tucson, Arizona, Lou Ann is both a new mother and recently separated from her husband, Angel, who leaves her on Halloween, shortly before she gives birth to a son, Dwayne Ray. Lou Ann is a bundle of neuroses and fears, considering every single unlikely calamity that may befall her or her son because of a dream that she considered prophetic that foretold that her son would not live to see the year two thousand. In contrast to the confident Taylor, who becomes her roommate, Lou Ann is perpetually worried about what others will think about her, and fears saying the wrong thing and offending friends who may abandon her. However, through the course of the novel Lou Ann becomes more confident and calm, particularly after taking a job at Red Hot Mama's salsa factory and channeling her nervous energy into a fervor for work there.