The ballet is good for her and so, I wouldn't interrupt it. I don't blame her for not wanting online. I feel the same way about online after so many meetings on Zoom during Covid.
Your choosing divorce is not the reason for her mother's distress, and you know that. There's no way to know what her mother is saying to her. You are the emotionally stable parent to her and that is a good thing.
One example of the sadly innacurate thinking at this age is that, my BPD mother would blame me for issues at home. I actually believed that when I went to college, my parents would be "normal" and happy. That wasn't true of course.
Kids are magical thinkers. By the teen years they begin to gain more abstract thinking but still, and especially with a BPD parent who blames external things for their own issues, we don't know what is true or not when a parent says things.
At age 14, I was also asking my father for "reasons" why BPD mother was the way she was and if there were solutions.
My world outside the house was essential. Peers, school, extra curriculars all were sources of self esteem, validation, and an example of "normality" for me. The ballet provides this for her.
Home life for me at the time- was not stable, or peaceful. It was the outside world of school, friends, and activities that provided a sense of consistency and validation to counteract this.
BPD mother would threaten divorce at times, and at times it seemed possible. Our initial reaction when we were younger was to be scared and sad. As a teen, I wished it would happen, thinking it would stop the conflict- and I could go live with my father. Still, I had no real understanding of BPD, or marriage and divorce then, or what that would involve.
My own understanding of relationships, mental illness, BPD, marriage- all this evolved as I matured myself. What your child thinks at 14 will be different than what she thinks later.
I think birth position and personality may be factors too. My younger sibling seemed to have a different relationship with my BPD mother. They were more attached than I was to mine. I was the more parentified one and it's possible your older D is too. Still, an age gap of 2 years in maturity and abstract thinking make a difference in how each of your children are processing this.
Your being the stable parent makes this role even more essential to your children, and so the more you can protect your own mental health and resources, the better you can be for them. I still believe that the best thing you can do for your kids is to maintain your emotional well being. You are choosing the best way to do this for yourself.
Although my parents stayed together, my mother's emotional needs and her moods took most of my father's resources and attention. I know he also made the best choice he knew to do at the time with his situation- but it didn't solve my mother's BPD or create "normality" at home.
Your being more at peace and stable will ensure you are emotionally available to your D and can be a mitigating factor. Counseling will be there for her when she is ready and able to do it. Her task now is to be 14, and to think and feel as a 14 year old. Your role is to be the stable and caring Dad she needs now, and it's OK to say you don't have all the answers, but you know for sure that your love for her won't change no matter what.


