I guess my uncertainty is around what NC really means too. Like cold turkey don't talk at all? Or just be polite don't ask questions. Like "good morning", "hello" stuff, but not "How was your day at work"? Do I want to create the almost "hostile" place where we give each other the silent treatment? That seems a bit overkill
In your situation, NC (between you and WW) is impossible, so definitely put that out of your head. You cannot go NC with WW, and you never will, actually, because you have kids.
And no, you definitely don't want to give the silent treatment. No sulking, huffing around, rolling your eyes, scowling, frowning, and making your silence "known." That is not 180 behavior and it has the opposite effect of the 180.
Instead, you treat her like a business associate who no one really likes, but you have to work with anyway. You're not mean, and you're not a jerk; you're kind, but distant. You absolutely can say "good morning" or talk about "business" (for you, that's the kids and finances), but otherwise your focus is elsewhere.
I also assume that I just do it. I don't announce what I'm doing.
Correct. You just do it. No more engaging, no nothing. You don't ask her where she's been or where she's going, and you don't offer the info to her. Your time is your time, and hers is hers. You don't follow her around the house, you stop doing things for her, don't make her food, don't do her laundry, you don't engage in any conversations at all unless they're about the kids or finances. When the kids are in bed, you're done for the day--no hanging out and drinking a glass of wine with her on the couch. If that's what she's doing, then you go into your bedroom and play a game on your phone and go to sleep.
And so on.
As it is now, she's living here (in her own room.) So, we have to get along to a point.
Totally. Just like the person you have to work with and be nice to but otherwise have no interest in hanging out with. You're kind and pleasant, even smiling and helpful when with the kids. But then the whistle blows and work is done for the day.
"The Strength in our Scars". That is actually out-of-character for her. So, I at least know she's trying to "fix" herself as well.
People who are actively doing (or have done) something that is generally shunned by society and against their own ethics and value system have a psychological *need* to justify their own behaviors. Hence, for your wife, this book.
I've seen it a lot here and my exWW did the same. Cheaters find books and articles that almost "back up" what they're doing and thinking, even if they have to twist the author's intent. I was frantically reading everything I could related to healing a marriage from infidelity, and she was suddenly a Brene Brown (who is awesome, don't get me wrong) expert, reassuring herself that she was a strong, self-actualized woman for sleeping with the 25-year-old kid at work while still married to me.
I haven't read this book, of course, so maybe I'm wrong. Doubt it, though.
~
Anyway, back to the 180: it's not the silent treatment, and it's not being mean. It's just a way of being that gets good results for someone in your position.