My Niece----Not Her Parents Favorite

After playing badminton with my niece, we were waiting for to paying the bills of for the two hours play and I popped up the question for to her, ”Did you get along with your younger brother? ” with while knowing that she hates him because her parents, especially her father, always shows more love for her brother, which is very unfair for to her . So She has treated her brother brutally ,which I have seen many times.
Then she quickly asked, “ why did you ask that this, we only agreed with each other when buying toys.” I gave her a small smile . Then we paid the money and went back home. But I know she barely talks to his her father and that’s all her father’s fault.