You typically can get a few to meet with you just to consult ... them selling themselves to earn your business.
As far as filing and beating her to the punch ... for what? Do you want to D? If not .. typically we urge the LBH to just DB and do his thing, do not make any of this easier for her, she could very well say "Well you filed so I must have been right, this is what you wanted all along" .... see how she can flip this into being all YOUR idea?
When and if it comes to the house/kids ... you Lawyer up and let them fight it out ... all while being Joe Cool and PMA all over the place like there is not a care in the world ...with the attitude of 'you did not ask for this, it will not break you ... you are going to be just fine regardless'