I'll be as brief as possible.
My brother and his partner have been together on and off for around 12 years or so. Things started to go wrong between them 5 years ago and they have been on and off ever since.
Every time things go wrong between them his partner likes to drag me and other family members into it, and when we tell her we don't want to get involved, she goes from being the poor innocent victim, to vile and abusive. I have blocked more of her phone numbers than I can count because she changes them every 5 minutes ffs, and she's been blocked on all of my social media accounts, as I have absolutely no interest in their drama.
Last June I was 7 months pregnant, and I got a random call from a private numberand it was her again telling me how awful my brother is etc. I tell her I'm 7 months pregnant, and I'm in no fit state to be dealing with their drama as I don't need the stress. As I'm about to hang up, she shouts down the phone to me that she hopes my baby dies.
I told my brother this, and that I've had enough, and that if he goes near her again he can't be a part of my life anymore, he promises that he's done with her and will put me first for a change.
Fast forward to yesterday, I find out that they're back together. I tell my brother that I'm disappointed in him and remind him what she said to me about my baby, his response is "we all say thing we don't mean in the heat of the moment". I've since blocked him so that he can no longer contact me on any platform.
Family members are telling me that I should be there for him, because when things go wrong again he'll need me (he's closer to me than anyone else in our family).
I'm 90% sure I've done the right thing from cutting him out of my life, but I would like outsiders opinions as there's no emotional attachment. AIBU?