I would put the burden on her. If she wants to sell the house then she can get all the paperwork to do it. IF she wants to get a D she will have to do all the work. You should not aide her in that endeavor.
DB principles are there for you to feel good about yourself. If you are confident about talking about the R then do it without sounding desperate or clingy.
YOu def have to go in there and be a confident man. First thing is first, you have to put her at ease about the whole situation.
Make her laugh. Make her see that you are easy going and that no matter what she says you can take it.
Don't act indifferent. Act concerned but understanding. Empathize and validate.