If you have served her properly and have filed proof of the service with the court and she does not show up at court, the court will enter a default order which will provide for the relief you requested in your petition.
If the order prevents her from moving and she ignores it, you will need to consult with the sheriff regarding a writ of habeus corpus allowing the sheriff to go get the kids. This is VERY traumatic for the children; if you are not there when they are picked up, they will go to foster care. Don't let that happen.
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If the court at the hearing orders that she shall not relocate the children's residence, she can be ordered to return them to WA if she moves anyway. If she violates that, you could ask the court to change custody, at least temporarily. Much will depend on the specific facts.
With this kind of history and behavior, you need an experienced local family law attorney.
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