The reason being my Dd is 5 ft 7 and weights 8 stone 10, and is starting to look a bit chubby. Although we eat healthily, she has started buying junk food on her way to school and gorging on it throughout the day. However, last nigh she came to me crying that she knows she is fat and she doesn't seem to be able to control her eating, leading to her binging on junk. What should I do?