Just to clarify, please, Wonka, "work with her on D" means that I sign the papers?
1) After that line to W about not wanting D, but would work with her on D. Then you sit back and wait for W to send the paperwork to you.
2) When you do receive the paperwork, go to someplace alone and look it over. Does it talk about division of assets, separation, child custody issues, joint bills, etc? If yes, then it would be best to retain a L who can assist you with these complex issues. Don't negotiate with W alone. Let your L handle these stuff and he/she will have your best financial interests in the process.
Another scenario to keep tucked in the back of your mind.
If your W has not yet filed D paperwork and is pushing you to do the paperwork, tell her:
W, remember we talked about this before. I am waiting for you to send me the paperwork. How's that going for you?