I thought you were telling me that with compassion and by making her understand that I'm always there for her, I would be able to end all of the interpersonal conflict between me and my wife, and therefore enforcing boundaries would not be required.
But then you just agreed with Rowdy on the fact that the BPD partner can devalue you and leave you just a few weeks after having stated that you are always there for them.
Now I'm confused. What's your final opinion on "How to enforce boundaries when living together" ?
Compassion and saying "you'll always be there/support her/fight for her/etc" is the recipe, until the next dysregulation happens. And if you catch it early, sure, the conflict can end very quickly or maybe there's no conflict at all.
But you also know that BPDs can hold back and hide so much of what's really going on. Maybe catching the mood shift early isn't possible, maybe everything blows up a week or a month later. You're thinking everything is fine and then 'boom'.
For instance, my marriage ended because my ex wife stopped talking. She was depressed out of her mind, she spent all her free time away from home or in bed, and I kept asking her what was wrong. Each time she said, "I don't know."
Today, I could respond to that a whole lot better. But back then I had no idea what was happening or why she was becoming so distant. There was no argument, no big fights, nothing. Plus, she hadn't been diagnosed at the time so I wasn't even thinking major mental illness. She ended up having an affair and left me for the guy.
Once she was gone though, within days I saw the classic BPD venom on full display. I was thinking, where the heck is this coming from? All the anger and hatred exploded out of her and she said things I never thought she was capable of saying. That's when I talked to our family doctor, who knows my BPD kid's full history, and she started connecting the dots. I felt like a complete idiot not realizing the patterns from early in our marriage and how our kid was at the same age.
On thing my ex said to me after she left really stuck with me. About two weeks earlier, she walked up to me in the kitchen and just looked miserable. I stopped what I was doing and hugged her for maybe 10-15 seconds, then finished whatever I was doing and went on my way. Fast forward to days after the breakup, she said, "You knew how badly I needed you to hold me and how horrible I felt, yet you just gave me a quick hug and walked away like I was worthless."
Three years later, that still stings because I HAD NO CLUE she had disordered thinking and felt anything like she described.
So if you can't see it and you don't know about it, then the explosions can seem like they're coming out of nowhere. They're rarely about one little thing though, it's a buildup of things that stem from unstable emotions and dangerous thinking. And when it builds, it's much harder to reverse in the moment.
Since I've really dug into this though, my ex and I are now on good terms and can speak normally. I just had no idea what I was dealing with or how sick she actually was/is.