Are the kids in counseling? (highly recommended).
The old movie "Parent Trap" illustrates this kind of imagination kids have. I think in some ways this makes you feel bad to see her feel this way but know that this is her being a kid. She is going to have her own age appropriate ideas about this and feelings about it. Hopefully she has a neutral counselor to work with on these.
My parents did not divorce, but their issues were apparent to me at age 14. Still, I had no real idea about adult relationships. I recall saying to my BPD mother something like "the boy I "liked" at summer camp and I didn't fight so why can't she and Dad get along?". That's about the level of understanding a 14 year old has.
Yet, I was also parentified and BPD mother confided TMI to me. Somehow, even by that age, I felt responsible for her feelings and so, it's possible your D may feel she needs to "fix" the situation.
Because of hearing TMI, I did ask my father some questions that he probably was uncomfortable hearing but I was only asking them because of what I had heard myself. I still didn't fully understand what I was asking.
Your D may "see through" your inauthentic answers and yet, she still has no real idea about the complexity in your relationship, but at her age, it's not for her to know. (probably TMI to know personal details about one's parents' relationship at any age).
From my own experience, this is what I needed to know from my father- that he loved me, and that no matter what happened between him and my mother- it wouldn't change anything between us.
Valiate her feelings "I understand this is scary and you want us to reconcile" "but it is up to us as your parents to manage this situation". That it is OK for her to ask questions and she can talk to you if she's worried, but you hope she can let the adults be the ones to manage this, and that your wish for her is to enjoy being 14, with her friends and school.
However, what you do say to her needs to be authentic. Saying things like "hopefully some day" doesn't ring true and she knows that. It's probably not going to be like that (even if my parents stayed married- there were still issues). Although you are saying these things to help her to feel better, they aren't true and so they backfire and also can feel invalidating in a way, as if she needs to not feel sad or upset. Her feelings are normal. I think it might be better to say you "understand how she feels" and just hug her and reassure her that it's normal to feel that way.
As a child of a mother with BPD (and other's from the that board have stated too) we have our wishes. We wish things could be normal. They aren't normal. But it's normal for us to wish for that and also normal for us to feel sad that things aren't. Your divorce from her mother is not the reason things aren't normal and reconciling won't make them normal and you know that.
I don't know the road not taken but I can tell you that staying together involved issues too. However, your ex wife may be blaming her situation on that. You know that isn't true. Either way- had my father stayed or left, I would have to accept that he decided with the adult level information he had at the time. You have made the best decision only you can make, not one a teen can fully comprehend at the time.
What I found to be helpful was getting away from the dynamics. Going away to summer camp for me was that kind of experience. If camp is doable for your D, that is something to consider.
What did I want most from my father? Him being the stable parent for me- and to know that he loved me unconditionally. You are protecting your own mental health and being available for your D. It's scary, it's unknown to her and she will feel what she feels. Be the emotionally safe parent for her to turn to.


