This excerpt from "A Good Man Is Hard To Find" reveals that the grandmother 'cares deeply about her appearance' since one would think that she was a 'lady.' In other words, 'a woman of superior social position.'
After John Brown was hung for several accusations regarding slavery abolition in 1859, there were two perspectives about him, and this represented a controversy: On one side, people were in favor and wanted him dead. On the other, people considered him a hero.
While the first claimed he was a murderer and subversive whose intentions were to bring a servile civil war down, the second saw in him an example of true patriotism, someone who sacrifices himself for the emancipation and salvation of a despised race, that is to say, his brothers.
First, English is not the mother´s native language, but she makes an effort even though the idiom is not like that.The mother uses an idiomatic expression probably to demonstrate that she is close to her daughter ,that she understands her .She might be telling Yoyo that she knows she will get what she wants and deserves.At the same time the diomatic expression makes her more familiar with the Americans and also, certainly, with the American dream.
The mother supports her daughter.She kows she will get as far as she wants to because she thinks she is talented.All mothers have a very high opinion of their children.