I think you really need to temper your expectations right now. I think you have a tendency to view things as progress only to be disappointed later. I think your W is perfectly fine with keeping you in the FS until it doesn't work for her anymore.
So, what are my expectations? And what do I do with that information? I try stuff. I evaluate. As far as W being fine keeping me in the FZ? I tend to agree.
So LH19, what would you suggest if this is the case?
Your'e in a tough spot right now. I don't think your W will change her stance anytime soon if ever living in the same house together. I think you have to ask yourself can I live the way I am living right now (BTW a lot of middle age people live this way) for the rest of my life? If the answer is no then you should move on. I would imagine with trust issues it would be a brutal feeling every time something seemed off.
After studying theses sitches for almost four years, time and space are the only thing that turns these things around long-term.