Make sure you don't take the bait when WW tries to suck you into an argument.
I've seen several instances where the LBS allows the WAS to do what they want regarding the kids because they don't want to rock the boat and are hopeful for reconciliation. Don't fall into that trap.
Be firm but respectful when it comes to your children and what you believe is best for them. Stay in the house and don't let her bully you or suggest that she may be willing to reconcile if you were to leave the house and allow her some time. It's a trap.