I agree with most of the posts. We are currently sitting at Denver Childrens Hospital doing a tune-up. My son is 14 years old, and he too will do his treatments when he is reminded. I use to let him do them in his room, thinking that is what he wanted and was easier for him, but he actually does a better treatment in the living room interacting with the rest of the family. Raising regular teens is tricky and hard to figure out how much to contol for them, how much to let go, how much responsiblities to give them, but it is even harder when they have CF. I have heard from many CF patients over the last 14 years that they wished their moms were as involved with their care as I was with Nathans and that they would have probably done more of the things they needed to do if their parents had been more involved. With that said, yes we want them to gain independence, but they need to know without any doubts whatsoever that we are here for them and that they do not have to do it alone, now while they are teens, or later when they are adults! Never, not even one single time, have I ever heard a teen with CF say they wish their parents would leave them alone to deal with the disease. It is possible she is depressed, but maybe not for a reason you are thinking, maybe she wants your help but doesn't know how to tell you and is afraid that you will be disappointed with her. My experience with my teens is that the harder they are pushing us away, the more they need and want us.
Yes, at least she is doing the treatments when you remind her. Consider that she may be trying to tell you that she still needs you to be involved with her care.
Good luck,