(((LexieZ19)))
I agree with Omers. Laying down the law could make things a lot worse.
Hopefully, the therapist and your friend's daughter will be able to work through these issues together and things will improve.
You are a wonderful best friend to have. Kudos to you for being there physically and emotionally for her daughter!! I am blown away ~ just felt compelled to tell you that. I hope that your relationship with your friend's daughter continues to grow and that you both enjoy having each other for love and support.