You're the only person you have to live with the rest of your life
The problem is that she assumes that because she had it so well that everyone else like her also had it as good. She doesn't understand that there are people out there like her, and by like her I mean white, that did not have a two parent family. That did not have a mother at home waiting for her with an after school snack to help her with her home work.
I remember at lunch all the tween girls were braiding each other's hair and one of them came over and asked if she could touch mine. I have VERY straight.. Very blonde.. Very silky hair. She had never seen anything like it before. Her friends all chimed in saying that she couldn't ask that. They said how rude she was. I smiled and told her "of course you can.. you'll never learn about anything new if you can't experience it.". The rest of the girls were so excited and they all wanted to take turns brushing and braiding my hair. I didn't think it weird that they were interested in learning something new. I found it weird that they had never known a white girl who's hair they could touch. I'd known plenty of people of color in my life in a small town and we all played with each other's hair.