Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: Why Gertrude Baniszewski is upset ? Movie plot title: An American Crime Movie plot: An American Crime alternates between the 1966 trial of Gertrude Baniszewski (Catherine Keener), and lengthy flashbacks to the events of the previous year described by the witnesses. Sixteen-year-old Sylvia Likens (Ellen Page) and her 15-year-old sister, Jenny (Hayley McFarland), have, in the past, travelled with their parents who work on the carnival circuit. She and Jenny now live with their mother, Betty Likens (Romy Rosemont), who recently separated from their father, Lester Likens (Nick Searcy). Betty reconciles with him, and they decide to go on tour together. They agree to leave their daughters in the care of a single mother named Gertrude Baniszewski, whose daughters the Likens girls met in church. In dire financial straits, Gertrude offers to care for their daughters for twenty dollars a week, and as their parents leave, the girls settle in with Baniszewski's six children: Paula (17), Stephanie (16), Johnny (13), Marie (12), Shirley (10), and infant son Kenny. Sylvia befriends Paula (Ari Graynor), who confesses to Sylvia that she is pregnant by her married boyfriendSylvia swears not to tell. Soon after the girls' arrival, Gertrude is upset that Lester's weekly payment is late and punishes the girls by whipping them with a belt. The payment, along with a letter from the parents, arrives shortly thereafter, but Gertrude throws the letter in the trash and says nothing to the Likens girls. While Paula and Sylvia are out with friends, Paula's boyfriend tells her that he can no longer see her, then hits Paula when she pleads for him to stay with her. To stop the boyfriend's attack, Sylvia tells him that Paula is pregnant. Paula, furious, vows that Sylvia will pay for revealing her secret. Ricky Hobbs (Evan Peters), a neighbor of the Baniszewskis, who is attracted to Sylvia, observes the scene. Paula tearfully tells Gertrude that Sylvia has been spreading lies about her. Gertrude forces Sylvia to apologize, and has her son Johnny (Tristan Jarred) hold Sylvia so that Paula can beat her. Rumors spread...
A:
That lesters weekly payment is late