Hate to tell you but your way is not working! If you're not open to new suggestions, then don't post. This is not about material possessions for your W. Nothing you write on a piece of paper will make your W trust you. Not to mention, no lawyer worth his degree would let that hold up. IT'S NOT ABOUT YOU! It's something that she has to work through.
If this is how you treat her, no wonder she wants out. Back off before it's too late. All you can do with your action plan is drive her away.