There are pros and cons to having an in-house mlc'er...yes, she gets to see any changes you make and determine if they are real, etc., BUT, you also get to witness all the craziness, any affairs, etc, etc. AND, it's hard being in "it's show time!" mode all the time...hard to get space to yell, rant, cry, whatever. And you have to resist the urge to engage her because she is right there and that's what normal couples do, sort of thing...hope that made sense...
Main thing is, IF she wants to go or quit, YOU DO NOT leave the house. You can't make her stay, naturally. But do not be the one to leave, if that is her choice, she needs to go. I was adamant about that right from the get-go, and one thing I told her in polite, calm, but no uncertain terms.
Hope that helps, and others will chime in too... T^2
In the depths of winter, I finally learned that within me there lay an invincible summer. - Albert Camus
Uncertainty is the very condition which impels people to unfold their powers.-Eric Fromm