I will be polite, but continue to show strength in my discussions and actions. I will get things moving for the D - first step would seem to sit down with her and talk about what D will look like - financial aspect, custody, etc. Not doing this to get a reaction from her. It is the only option I see at this point.
I know you're a lawyer, but it seems to me that first step should be your sitting down with a lawyer, not W (unless you've already done so and I missed/forgot it).
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac