What do you have to lose at this point. I would say still change the locks, and go darker than dark until the hearing. Dont offer for her to see the dogs, let her come to you. I would just remove yourself from all this going forward. It is kind of what I have done, I have removed myself from the W's bs. When she has crap behavior i do not put up with it, when she is nice I am nice. Again our sitches are different, with kids it makes it to where you can go somewhat dark, but you also "have" to interact with each other for the rest of your lives.
But you also have an up here, you need to get the GAL and PMA going beyond belief right now!