Tche's onto it. Eating late just before bed means that just about the only energy being spent is digesting the food, so it only goes to restore your body (from energy spent over the day), and then stores everything else (fat!).
Try to have her eat irregularly. A few days of very small amounts of food followed by obscene amounts for a day or two, but keep it really random. The body is constantly in survival mode, so if it ever feels that there is a shortage of food, it is going to hang on to every bit of energy that it can when food is plentiful. When I'm helping clients lose weight, it all basically comes down to routine. So lack of routine means more weight!
Basically you'd be using her fast metabolism to your advantage.
Good luck ;-)
6 years
