Name the short story of a black woman that nurse a kkk old man who was racist to her?

There was a short story of a depressed woman who dropped out of college and moved back to her moms house but had to sleep in the garage. She became a health care aid through a temp agency and was sent to nurse an old man. She didn’t know he was in the kkk or that his wife was being rude and racist to her till her... show more There was a short story of a depressed woman who dropped out of college and moved back to her moms house but had to sleep in the garage. She became a health care aid through a temp agency and was sent to nurse an old man. She didn’t know he was in the kkk or that his wife was being rude and racist to her till her mind caught on. After he died the wife changed her heart and left her a big tip the agency wouldn’t let her keep. That made her want to change the world. Does anyone know the story?
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