You don't have to leave. Give her the "I have decided" speech: I have decided that I will not leave. You may use the next three weeks to find a place and get organized."
You have to stand up to this, OB. You just do. I know you know that - but I also know that it will be difficult with children watching y'all , 20 years of history and you do love her, after all. But this is a loving gesture, truly it is. It is loving to yourself - you won't let yourself be treated like this. And it is loving to her (altho she will not see it as such NOW) - you won't let her behave this way unchecked. We spank our little ones for the same reason, right. And what do we say - this is going to hurt you more than it hurts me.
Greek
Me45 H46 T25 M22 S21 & 19 D13 Separated and filed 8/08 Moved home 11/08