he girl refused to eat at mealtime and was wandering around, probably the parents repeatedly told her to come eat. Then she was hungry late at night and asked for food. Now the mom is telling her next time she refuses to eat them asks for food late at night, she'd will not give her any.
It's not cruel or mean, the mom is just trying to teach the kid to eat at mealtimes and not fool around then ask for food later. The mom also wrote that she was trying hard not to laugh!!