Answer:
Dee put on some sunglasses that hid everything above the tip of her nose and chin because it is the way how she lives, she hides behind her sunglasses suggesting that her superficiality didn`t changed.
Dee was always confrontating with Maggie, who is not recognized or hardly ever seen by the world. She is described as someone weak buy with some significant strenghts, for example: she always seems to have a real sense of family, also she has learned to quilt, which is something she share with her ancestors.
At the end, you can infer that Maggie gets the last laugh, since once Dee put on her sunglasses, Maggie smile in a scare free way.