Its over according to her. Rollercoaster continue

[TimeHeals]

I want to expand a little here: if she is making bad choices that affect her relationship with your son, it's natural that you will want to protect your son (hence be there to listen and affirm), but her actions do have consequences including her relationship with your son, and you intervening on his behalf is also you acting as her caretaker (and that's the part that isn't healthy).

You need to let her make her mistakes. You also need to protect your son as best you can, but I would pick my fights I think. Embarassment is not something that is going to seriously harm your son so long as you are there to teach him that her actions only reflect on her (and you do that with your actions).