I can't imagine how hard it is to send those papers back, but you MUST. She needs to feel in control for some reason right now so you are going to need to do that. I know that this must be one of the scariest things you've had to do, though. I'm proud of you!!!
2Step, the divorce might go through. And only you can decide if that's the end. As I was telling Dixie today, one of my closest friends divorced his wife and then ended up remarrying her. Now, that's not to say that you are wrong how you feel, that is just to say that it doesn't have to be the end UNLESS YOU WANT IT.