As weird as it sounds, it seems like that was... progress?
You didn't ride the roller coaster with her.
She is kind of coming back to a baseline. Looks like her timeline to re-regulate is more in days than hours -- does that sound correct? That might be really important to remember moving forward -- it could be that trying to check in with her after a couple of hours is too soo and she's not regulated yet.
[ Sidebar: pwBPD often have all three of the following:
-higher than usual emotional sensitivity (content that wouldn't bug you, feels very hurtful to them)
-higher than usual emotional reactivity (situations where you could keep your cool, send them over the edge)
-longer than usual return to baseline (you might be able to come back from an argument in a hour, it takes them a day or two)
You know your W the best, but it might be worth bearing in mind that the two of you seem to have different timelines for resolution post-conflict, and "intruding" on her return to baseline might be too much for her to handle and prolong the conflict. Giving her longer than you expect, to self soothe, could be worth trying ]
Yes, it wasn't "perfect". There are words and phrases and responses that create more options for you than just groveling/apologizing -- for example, agreeing with her that yes, you've changed --
and those don't magically give her enlightenment, like you experienced. But what's critical is that learning new approaches gives
you options.
You get more choices during those conflicts than just "ride her ride" or "grovel and beg". You get to: agree with her that you've changed, declined to take bait she puts out ("walk away husband"), etc.
It will be interesting to see if her anger over the timesheet is kind of the last burst in this conflict, vs re-ramping up.
The biggest takeaway for me from reading about this experience is that you are doing the hard work of practicing not riding the ride with her. This is different and won't go "perfectly" every time -- it takes practice to find the balance of caring about her while not making yourself available for hurtful/abusive behavior.
I think you had a good insight here:
She said I needed to read what she texted her sister and how she bled her heart to her. She very aggressively shoved the phone pushing it into my leg forcefully. I said please do not be forceful like that. She said I don't deserve to read the text and just as aggressively pulled the phone out of my hand. Mockingly she said oh am I hurting you?? what are you a f-ing pansy? Calmly I said I expect the same respect I've giving you and not be aggressive. Clenching her teeth she responded to that saying "stop talking down to me you mother-f-er. Stop it"
I remained calm but in hindsight I probably should have left much earlier. She kept threatening how much worse it was going to get if I walked away. All I do now is walk away she says. Walk away husband is what I have she says.
That's information that you can use if/when a conflict happens again -- that sticking around when she's aggressive and swearing doesn't help either of you, and you get to choose to take a break sooner.
...
Have you had any moments in the recent past where you think there was an opportunity to talk with her ahead of time about you "taking a break" when conflict is too heated for you? Can't remember if it's something you've tried in the past.
I.e. did she seem close to baseline/receptive when you were on the date (to be fair, a double date might not be the time, but just as an example of if she can seem open to trying that kind of conversation)?
Even though in the heat of a conflict, she might say all kinds of things about you "always leaving", or she might not remember any agreement, it can still be a relationship-building move to try to have those discussions ahead of time.
While the religious counseling might not be very experienced with PDs, it could be a forum where you have that basic conversation about: "let's get some agreement here when we're both pretty chill, I think I want you to know that in the future, if a conflict feels too much for me or if I feel overwhelmed, my plan is to tell you that I'm taking a break and will text you in an hour about a good time to continue the discussion". I'd hope that even a religious/pastoral counselor could help a couple discuss conflict management at that level.
Could be interesting to find agreement with your W that yes, you're open to trying the counseling thru your church, maybe they can help you both find different ways to manage conflicts.
Has your W articulated why she wants counseling -- what she sees as the problem?
...
Hard stuff -- doesn't mean you weren't successful at finding a new path forward.