How does the author use foreshadowing while explaining the reason for Aunt Alexandra's stay in chapter 13?

  The major way that the author uses foreshadowing while explaining the reason for Aunt Alexandra's stay really lies in Aunt Alexandra's sense of family pride.  She says she has come because Scout was growing up and maybe needed a woman's guidance.  Then there follows a description of how well she fit into Maycomb and its society.  A little later she talks to Atticus about Scout's behavior telling him that Scout needs to understand her family history so perhaps she will curb her behavior accordingly. Atticus tries to talk to her, but cannot follow through because he does not really believe any of this family pride nonsense.  All of this of course, foreshadows the coming trial in which her father will behave in a way that angers the society of Maycomb and isolates him and his family from that society.  Atticus breaks from Maycomb society in a much more serious way than Scout's childish behavior could ever do.  In a smaller way, Atticus foreshadows the time the trial will take from him when he tells Scout that Aunt Alexander is doing him a favor by coming because he cannot be around all day.