You're not on the title, but are you helping to pay the mortgage? If so, tell her if she insists you move out, she has to take full financial responsibility for the house, since you're not an owner.

I still wouldn't move out without talking to a lawyer.

Keep breathing, and do not act out of emotion. Use the 48-hour rule on any action you think you want to take. This calls for calm, cool strategy.

Oh, and I hate to say this, but I'd say the odds are she's met someone else and is either in an EA or a PA.

SD

Me: 40
H: 43
H had EA from 2/06-9/06
Bomb 5/06
Piecing since 9/2006
3/2008: Boundary setting
7/2009: Boundary crossing~dropped my own bomb.
8/2010: Marriage finally on track!