I understand she's very insecure and she admires my leadership. She even competed with me in the past, when I was living with them. I cooked sometimes for them (she doesn't like any food and to cook, but my father does) and he liked my food...she got competitive. She complained the food was bad, lacked this or that (and she's a terrible cooker). Or said she used to make that food and her friends loved it. Or that she doesn't do that because "your father doesn't like". This and that....after some days (and until today), she began cooking the same things I cooked... ouch....