Originally Posted by valinors_sorrow
Yes, I understand, she was probably bad news on some level but too good to be true on another (and you somehow knew all along, I bet -- we always do!) Consider this a good lesson in honoring instincts.
If you really feel you've been had.... leave without her awareness (be sure to take what is important to you as you might not get another chance) and leave a note to let her know you'll be happy to meet her at ________(some neutral public place) to talk, if she requires that. You could become at serious risk if you stayed to fight it out. I don't mean to sound paranoid here but she has a son and an ex as resources. I would hope to God you don't end up a story in the newspaper but this is partly how those kinds of things happen, frankly.
How easily can she get out of the house, is it rented, is it sellable? Do you need to give her money to buy some time for her to make preparations? You have some responsibility in having created the house with her and that needs to be addressed somehow, too.
I see you learning the lesson and trying to keep a level head, which is good.