It's rude to treat someone badly because they are overweight.
Tony's sitting with his daughter whom is overweight, she asks him if she can have some chips.
Tony wants his daughter to achieve a healthy weight.
Tony gently tells his daughter he is worried about her weight, but respects her freedom and offers her some chips.
Tony tells his daughter that she is too fat and will get even uglier if she keeps eating, so she can't have any chips.
Tony's daughter eats a couple of chips but thinking about what he said decides to stop and hands them back to him.
Tony's daughter runs to her room and cries and sneaks into the kitchen later and snacks in order to feel better.