Cory, I can only personally say what I'd do in your situation but I'm not a veteran here. I'd put up one last fight before agreeing to sign on Monday. I'd say something like "We're communicating so much better now. I believe we can fix this. I believe in us. We don't have to do this. We can make this work." If you don't do that, you'll always wonder what may have happened if you did, just in case she's not sure in her own mind. Then if she still insists on the divorce you can go back to the same approach of validating, acting as if, etc..
