What should I do if my father is very fond of girls over boys? Father's birthday. He kept picking up dishes for his grandson (my sister’s daughter). Don't give it to me

What should I do if my father values ??girls over boys? On my father’s birthday, I keep giving him what’s in my heart. The eldest grandson picks up vegetables. Don't give it to me. For that matter, girls are favored over boys. It is a wish of the old man. If I don’t serve you food, don’t hold a grudge in your heart. Bringing food to your granddaughter doesn't mean that she doesn't like you. It's a small thing. You cannot judge from a small matter like picking up vegetables that your father favors girls over boys. You should be your own son. Just do whatever needs to be done.