Hi BookFace
I can't say which is the right or wrong approach to this. I'm new here too and only learning about BPD and PA.
I can say that I wish I'd have listened to my lawyer and the counsellor I had when I left my ex - when they recommended mediation. If I could turn back the clock, I'd jump on it in a heartbeat. It may have changed all that's happened since then.
I thought I knew my exH, I thought we'd be able to work it out on our own to find a shared custody arrangement, and I thought our children would be able to make up their own minds. Wrong on all of it. Every possible accusation has been made against me, every possible form of maliciousness he has done - and no professionals to help shield the kids from him. I wish I could turn back the clock, because the first thing I'd have done was bring in the mediator.
Your daughter is a baby, that's a long stretch of years to have to try to deal with an ex that might have BPD. PA, at it's worst, is the most painful, heartbreaking thing for both the children and the alienated parent. It's hell on earth tbh. Once it starts, once it progresses the damage can't be undone and it's very hard to reverse.
So, it may be best to let in the people who know how to help - welcome them with open arms and work with them in every possible way. It may not always go your way, it may not always work out to be 100 % the way you want it to be - but it is a buffer, it is protection for you and daughter. It is someone on the outside to turn to, to talk to and to lean on for support. And, working with them may save you a lot of grief through the yrs of trying to work with your ex, especially if she does have BPD.
Best of luck
