In To Kill a Mockingbird,Atticus has always tried to instill in his children a sense of fairness and a belief that everyone is deserving. He does not judge others and wants his children to understand that it is not possible to understand anyone else's actions "—until you climb into his skin and walk around in it.” (Ch 3) In chapter 13, Aunt Alexander arrives and attempts to impose her own sense of family and morality on the children. It is important for Scout and Jem to develop their characters by being exposed to many different attitudes and opinions but Scout is not happy with her influence as it counters everything her father has taught her. Atticus tries to talk about the family's "gentle breeding" but Scout can see that it is Aunt Alexander's power over Atticus that is making him talk this way because "My father never thought these thoughts." Scout's ability to perceive the differences in her father and in her aunt's presence reveal her developing awareness and maturity.
Aunt Alexander will impose some "feminine influence" but Scout is aware that she does not really fit into "the world of Jem and me." Scout also demonstrates her growing maturity when discussing "Aunty's" requests with Atticus and is relieved that he does not expect her to "remember everything Finches are supposed to do." Therefore, Aunty's discussions of the family heritage and her different outlook contribute to Scout's self awareness and emerging sense of responsibility as she recognizes Aunty's part in her development as "It takes a woman to do that kind of work."
In Chapter 13 Aunt Alexandra moves in in order to teach the kids her ideas of family and morals. The kids are influenced even if it is not to their liking because it is different than what they were taught by their father. Aunt Alexandra was there to give Scout "feminine influence". Scout starts to mature as she sees things differently and explores their family heritage.