I live in PA which is a no fault state, if that's relevant.

A few years ago I posted here asking if it's OK to move out from stbxw before the divorce is final (My retired Dad has a decent sized house and would love to have me) But the general consensus here was NO, do NOT move out the the house, as this can set me up to lose my half equity in the house and other financial problems.

In the ensuing years it's become obvious beyond doubt that she's a Covert Narc. Oldest daughter with a psyche minor figured it out. She moved out after college graduation and "grey rocks" her mom. I believe she's instructed her other 2 sisters to do the same until they're out too. (One in college, the other in HS)

She refuses any kind of marriage therapy (most Narc's don't see a problem) and many posts here say it's worthless anyway.

I've reached a point where I really have to start considering filing for a separation likely leading to a divorce.

Once I see a lawyer, shit will likely get crazy, so I'm asking for advice here first. What really are the options for me getting out of the house in a temporary way (live at my Dad's house) to avoid the initial blowups, with the intention of moving back in and living there during the pre-divorce to not get screwed over financially and lose my half of the value of the house? Remember that this is no-fault PA if that matters.

What can I do? Any advice is welcome.