Don't take her text as the key to suddenly be her best friend again. She's covering her tracks and trying to act as the "good guy" in public.
IMO you should just continue to ignore her. If your mom feels uncomfortable about meeting her, then she shouldn't go. Your W is trying to get people on her side. It's probably unconscious, yet it happens.
What exactly did you apologize for? In retrospect you shouldn't have done that. It continues to give her control and power over you.
There was a study I found about someone in MLC that may apply here. It mentioned that people in MLC should be treated with compassion, yet not be enabled and be strongly lead in the right path at the right time. She needs to know what you will not tolerate. But you don't say it in an in your face way, you do it as an adult. Very calmly and cool.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.
