Why did Mrs. Harling like Antonia so much?

Mrs. Harling likes Ántonia and tells about how grumpy and demanding Ambrosch was. Ambrosch wanted all of Ántonia's wages to go directly to him, but Mrs. Harling mandates that a certain amount will be set aside for Ántonia's own use. Mrs. Harling comments on how pretty Ántonia is, and Jim and Grandmother are pleased at the praise. Grandmother then tells a brief history of the Shimerda family. I think Mrs. Harling liked Antonia's work ethic and felt sorry for the situation she was in with her brother.