Why are you so determined to tell her this is not what you want? Has it worked in the past? If you are not ready to pursue with D papers and you feel rushed about it.....why are you doing it?
How do you see her reacting to that message? "Oh what a relief! I was so afraid he would really go through with a D. But guess what, he doesn't want a D, after all. I was so mistaken, b/c I thought he did!" Not likely. Stop trying to fix this with yet another message, hoping it will change her mind.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!