No matter what your wife says or does, she is not nearly as confident about this decision as you imagine.
My advice to you is only speak when spoken to - about the children. Do NOT reach out to her for anything. Just leave her to her decision while you start making a life for yourself.
My wife seems very confident of her decision to file for divorce, and divorce me.
She has told me that she no longer wants any contact at all between us except that regarding the kids.
ps - sorry for the hijack, just reading and saw some stuff that I could relate to.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.