If they are overfed, they won't get hungry as soon or won't eat as much the next feeding. She also sees children getting too fat because of stress. Studies show stress on children has increased enormously. When children are under stress, they don't talk about it. They act out their feelings by being defiant or wetting the bed or refusing to go to school.
Some children react to stress by eating too much, being less active and getting too fat.
For such unhappy children, food restriction is definitely not the solution, because it would only increase their stress. Instead, it is important to identify the source of the problem and resolve it. Then the child can go back to eating and growing normally. Given optimum parenting, children can grow up to get bodies that are right for them. We can't make children be slimmer than what is normal for them, but we can be sure we are doing all we can to allow them to grow well.