My uBPW wife of nearly 34 years has been steadily getting more and more dysregulated over the past 10 years since we retired. It seems as if she’s heading into a true mental health crisis, and it’s really really hard for both of us. We have two adult children, and we try to keep our marital conflict out of their lives, so they would be stunned to know what’s really going on behind closed doors.
It may be time to quietly share some of this increasing discord with them. However, there may be unexpected repercussions. Depending on how much they've been indoctrinated over the years, would they side with her? They may get involved and then the conflict might rise to an even higher level.
She thinks that I am 100% to blame for all of our problems as a couple and for any of the struggles that our adult children have.
Denial, Blaming and Blame Shifting are traits of BPD. Life is full of gray areas, neither black nor white, yet the warped perceptions enable such "all or nothing" views. Reasonably normal people would realize that. Ponder the difference between "sins of commission" (a person acting-out, harming others) versus "sins of omission" (a person acting-in, harming self more than others).
I have assured her repeatedly of my devotion to our marriage and that I am not looking for another woman, but she doesn’t believe me, and it’s almost a daily threat of divorce now.
This was a huge trigger for my ex. I was to the point of virtually stuttering in an attempt to always phrase my responses as innocuous as possible, even with my coworkers. She would criticize me even for standing in a group where a young woman was standing. It's been a couple decades, but I remember pulling up to a stoplight or stop sign and she told me not to look at an older woman crossing the street in front of us. I was driving, looking in front of me is expected. Well, except by a too-critical spouse.
I really don’t want to divorce, but I may not have a choice. Should I be secretly planning in the background just in case?
I wouldn't call it "planning" since your wish is to have a pleasant retirement, rather that you're "getting your ducks in a row" for whichever way things go. Maybe preparation for the future, whatever it is, is a less daunting phrase.
In case things get tense and an incident occurs where legal allegations are made, likely she would claim "he always..." as though a divorce would punish you for claimed {whatever} from years and decades ago. I and many other have been through divorces and one consistent judicial outcome was that any unsubstantiated serious complaints older than 6 months prior to filing may be heard, considered as bickering and legally hearsay, and otherwise set aside.
Of course, this is information for you. Your lawyer would strongly advise you to not share any legal perspectives or strategies with your spouse. Sadly, legal tidbits you may share could enable your spouse to focus on better ways to sabotage you.
On the drive to and from, she was pretty nasty. Fortunately she wasn’t shouting, but her emotions were still pretty intense... We had plans to go to another couple’s house for dinner, and shortly beforehand she threatened to call them and cancel, telling them we had been fighting. But we went and had a very pleasant time and for now she’s reasonably content. She has been isolating us for a while now and I think the socializing was good for both of us.
My ex also would vent when I was driving. We were alone and, just like at home behind closed doors, she felt free to "verbally vomit" as was previously phrased.
Toward the end of my marriage my then-spouse would flame out at those around us. First, friends were dumped, then our relatives, even my elderly parents. Perhaps she didn't sit down and plan it that way, but in reality I was increasingly isolated from others' support.
In those days, recording devices were quite basic. But I decided I needed some proof I wasn't the aggressive one - she always claimed she was the "victim" - so I did have some recordings just in case needed. And if protecting myself (quietly, without triggering her) documented her rants and rages, well, so be it.