At the beginning of chapter 14, Scout and Aunt Alexandra have a battle over going to Calpurnia’s house. Atticus did not know they went to church with her, and when Scout tells him he is surprised but Alexandra intervenes.
I remembered something. “Yessum, and she promised me I could come out to her house some afternoon. Atticus. I’ll go next Sunday if it’s all right, can I? Cal said she’d come get me if you were off in the car.”
“You may not.” (Ch 14, p. 181)
Aunt Alexandra worries that Calpurnia is a bad influence because she is black. She does not want Scout exposed to that neighborhood. Scout gets annoyed that Aunt Alexandra tells her what to do, and then Atticus and Alexandra have an argument about whether or not Cal should stay the housekeeper. Atticus defends Cal, and says that she has brought the children up well.
Lee, Harper. To Kill a Mockingbird. New York: Warner, 1986. Print.