I tried this.
But I'm working from home, and I'm sitting at my desk. So I can not leave. I have to send her out, and that doesn't work.
Or most of the time she starts when we are ready to go to sleep. And i refuse to leave the bedroom myself.
Or in the car, that is also a moment when she starts. So what to do when you can not leave?
It's an uncomfortable spot you're in.
When there's a discussion that I choose to step out of, I tell my uBPDw that I'm stepping out of the conversation or won't continue discussing it. Keeping that part as BIFF (brief, informative, friendly, and firm) as I can.
When I can leave the space, even just go into another room, I do. Even if just for a short while to change the setting. Often enough, she'll keep saying things. I do my best not to take the bait, and keep walking. Sometimes I'll repeat a very short validation, such as "I'm sorry it feels that way" and then repeat that I'm stepping away from the conversation as I continue to move to the other space.
If I can't leave (e.g., dinner with our daughter, in a car) then up to a few times I'll repeat that I won't continue discussing it. Then I'll simply stop responding. A couple of months ago, I was driving in a snowstorm, so that made it even easier to say I'm focusing on the road. There was something that I felt had to be discussed. But knowing we still had a long trip ahead of us, I said I won't discuss it until after we're back at home.
For a long time it felt like it took a tremendous amount of restraint not to say anything. Then over time it became easier. I got more used to the fact that what I say and what discussions I participate in are my choice. Similar to when I get a text on my phone, I have the urge to see what it is. But if I'm focused on something else or spending time with others who I want to be with, the phone can wait.
It still feels somewhat rude when I stop responding, but if I were to continue responding then I'd be incredibly rude to myself and not at all helpful to W.
When I stop responding, W will often escalate her rhetoric. And then eventually she stops.
T0M, remember to put your needs first. We tend to focus a lot on the other person, neglecting ourselves. That hurts us and in turn others around us too. Focus on your needs, be compassionate to yourself, and then in turn that will help you be compassionate to others too.