My aunt is eating unhealthy. Should I be worried?

She's 47. She's gaining weight now and won't listen to me that it would be bad for her to eat rice at like 8pm. She skips meals sometimes so she overeats after. She would eat anything and doesn't check it's nutrition.. She would eat like 2 cups of rice at night with oily fried veggie dumplings with other more stuff like instant noodles. She's even annoyed with me that I fried my eggs with water to reduce calories. She also believes cooking with olive oil causes cancer. She would also have snacks sometimes late at night. What could happen to her with these kind of habits?