What I'm trying to understand is why she isn't ranting at her mother, given the fact that her mother, when drunk, does everything that triggers her. In the past she did scream at her mother, but she certainly hasn't bullied her mother like she did to me. Currently, as a rule of the house, her mother said she wouldn't tolerate that anymore. Ok, but I said the same, and it didn't work. And my word is much firmer than her mother's. Maybe it is the fact that she sees me as emotionally strong and "unshakeable," while her mother is seen as senior, vulnerable, and breakable. If it's not that, then I'm missing some piece of this puzzle.
We all know that the deep root cause of a pwBPD behaviour is driven by a fear of abandonment and a need to feel loved/wanted/needed. That is why it is usually only the romantic partner that gets to see all the dysregulated behaviour and bare the full brunt of it. Often anyone outside that closest inner circle are completely unaware of a disorder as they will hardly ever get triggered by anyone that simply doesn’t mean that much to them.
We have all heard the saying you can choose your friends but you can’t choose your family. She chose you and will have a deeper fear of abandonment from you than she will her mother, she didn’t have a choice in her parent. Maybe her abuse of her mother is more silent and less obvious than her abuse towards you.
To use my case as an example. I believe I made her split when I said the words “stop buying drugs from him you are killing me”
That is certainly when I noticed small signs of her withdrawing before she monkey branched with him.
She actually said the words to me “I don’t want to destroy you, it doesn’t matter if I destroy him”
Does she get dysregulated and verbally attack him? I don’t know the answer to that. Does she abuse him in other ways? You bet your bottom dollar she does. She was unfaithful to him for a year! That was while she was renting a house on her own.
Since she has moved in with him, for just over a year now, she hasn’t to my knowledge been unfaithful to him. Certainly not with me but then I’ve put up boundaries. But she is now in the situation that Pook has mentioned about your wife, living under someone else’s roof, so the stakes are higher now if she dysregulated and may become homeless.
My ex avoids seeing me nowadays. When she does she can easily get triggered, start playing the victim, or get angry for no real reason. She still acts with emotion, not indifference. If I meant nothing she would act with indifference.
It is a little different in your situation as there is no third party and you are working towards improvement so she can come back home at some point whereas for my ex and I that isn’t the case, but I think that is why the pwBPD will emotionally dysregulate and verbally attack, because you were chosen and the object of their love, whereas the love for a parent, and I believe the ‘love’ my ex thinks she has for her bf is nothing but an attempt to bandage her emotional wounds, are completely different.


