how does Dee change when she arrives to see her family

I think Dee had changed a long time before she makes it back to her old home, she just turns up her condescending attitude. Dee patronizes Ma and Maggie with her passive aggressive remarks about her quaint history. Dee doesn't understand that her culture is not an amusement park or a museum. She cares nothing for her family's feelings and rather exploits them at every turn.Dee sees only how she can compensate for her own insecurities at the expense of her family.