Hi again ClaritySeeker -- thanks for updating us on what's going on.
To address your last question first:
Could she have been in remission and buried this side to her?
I think I've seen on the boards here that yes, some members' spouses seemed "mostly normal" for a while, and then traumatic/stressful events seemed to trigger strong PD features. I am not a professional so I couldn't tell you the why or how, or whether she "intentionally buried" that part of her or not, but I can say, yes, this has happened to others. At minimum it seems related to how pwPDs struggle to healthily manage stress.
I don't think I saw in your posts if something unusual, stressful (in her perspective), traumatic, or different happened? Or am I remembering that there was a house move involved?
I think I do recall you mentioning that she'd moved into a different room in the house. Is that still going on?
And how old are your kids, and how are they coping?