Hmm, that does make things very difficult. I'm not saying it's the same with your daughter, but I was also rarely home at 17 and that made it super easy for me to get away with my e.d. behaviors. Like with you, my mom didn't really know if and when I was eating or not eating. You may already do this, but when you compliment her, don't make it based on her body, weight, figure, size, shape, etc etc.