Hi lstar and welcome to bpdfamily
Your mother is elderly now. Has she as far as you know ever been diagnosed with any kind of mental, emotional or behavioral disorder? Has she perhaps ever received any kind of treatment for her issues?
One day, she took a knife to him (she's actually done this lots of times) because he doesn't shy away from her rages. He said he got sick of having a knife pulled on him, even though he's a lot bigger than her and not afraid of her. So he called the cops. They arrested her, but on the way to the station, she told them that he said he was going to kill her. So they took her to a hospital for "care" and went back to their house and arrested him!
Your mother's behavior is very concerning. Do you feel like your dad is physically safe there now? Is pulling a knife still something your mother does?
And who looked after elderly mom? ME! And she didn't spit any fire at me the entire time! Wow! That was just a revelation! That means she knows not to look a gift horse in the mouth! And here I've been thinking she didn't have any control! Thank you, Auslaunder!
Hey there moderators - do you know how/why my mom didn't attack me while I was the only one looking after her?
Now that is interesting that your mother didn't 'spit fire' at you! Working under the assumption that your mother has BPD, we can say that her mind is wired quite differently from non-disordered people. As a result she behaves in a way that to us might seem mind-boggling yet to her might make perfect sense. Though people with BPD can get very dysregulated, they most definitely aren't crazy and can be held accountable for their actions. They might not always know why they behave the way they do, but within the context of their differently wired mind, they might still exert control over their actions.
I don't know why your mother didn't attack you, there can be various scenarios. Perhaps she feared the consequences if you would leave too, perhaps she feared being alone and in her mind 'totally abandoned'. Or perhaps felt that you had such strong boundaries at the time that it would be in her best interest to behave differently.
Many people with BPD have an intense fear of abandonment which sometimes seems strange because by their own behavior they often are the cause of the abandonment they fear so much. Would you say that your mother has a fear of abandonment?
It could also be that the fact that your dad wasn't around changed the family dynamics so much for her that she didn't get triggered as much anymore. It could be that there is something in the interactions when the two of them are together that particularly triggers your mom.
Or perhaps you were just lucky That happens too! Some people with BPD go through extended stretches without any major incidents of 'bad' or 'problematic' behavior.