So here's the problem - no one is going to be able to answer the questions you've asked. It depends on the person. She might revert back; she might not. You might be able to work through a reconciliation, or you might not (a lot of that depends on you too). I can tell you this much, you can't count on her to revert back and you can't count on her to stay on the side of the Jedi even if she does go back. Everything to do with her is completely unpredictable. So it all comes down to you and what you want or are willing to deal with
I agree with this.
If you believe that she has BPD, then you believe that she has a real and very serious mental illness. Nobody can predict what will happen with it.
This new "party girl" was always a part of her, you just didn't see it before.
Possibly.
And that "wonderful mother" is still in there too.
Possibly.
BPD involves identity instability, and a very weak or empty identity at core.
These "wonderful mother" and "party girl" personas
may have been aspects of her personality all along ... . or she may have been "trying on" different identities. There may or may not be anything persistent or "real" about them.