Your reasoning is sound. If she should react as you say is there any other options you can think of. You cannot control another person's reactions other than to do what you know is helpful knowing the person. She can file, start it and do whatever she wants as she already has shown you she can do. But... she has also listened to you, is working on doing what works, just as you are, and it is working. Going dark is hard with kids - you have to have firm boundaries with that sitch. Plan your responses in advance if you can so you are practiced when the alt calls come - or the topic drifts.