Brother Dan: I know you are grieving the woman you thought was your soulmate, but you need to secure your children first, and then you can have the luxury of grieving the relationship.
Take a day off work (If you're drinking on the job, you're not much use there anyway). Tell them you have a serious family emergency. Use the time to visit a family lawyer for a free consultation. Tell him you don't have money, but you need to know which form to fill out for your state, to get an emergency injunction preventing your wife from taking your children out of state (where I live they can not move the children more than 100km away from the other parent without court approval). Find out what the distance is where you live.
Do this tomorrow, and fill out the form and take it to the family court registry the same day as possible, if not, then the next. Legal aid will often help you fill it out and speed things up if a child abduction is involved. Those cases are bumped to the front of the line. When you get a hearing also apply for joint custody at the same time, so that your wife can make no decisions without your approval. You do not need a lawyer for family court. You just stand there and tell the judge what you are asking and why.
Do not tell your wife until you get the hearing date and serve her with it as she may take the child and run if she knows your planning this. Do tell the judge that your wife is a JW and is taking the kids away in order to alienate them from you because of religious differences. Judges know JW's are nuts. Also, it becomes a human rights component, discriminating against you due to religion, and judges don't want to deal with that, so they'll go the easiest route and probably grant joint custody to you.
If she tries to run before the hearing, the police may be willing to talk her out of it if they know you have already applied for an injunction are just waiting for a hearing. That could scare some sense into her. I know that sounds harsh, but taking your kids out of state during a divorce is a criminal offense in many places.
When the dust is settled, you'll realize she never was your soulmate. A soulmate wouldn't do such a thing to her partner. She is also not being a very good mother as you think she is, because moving young children away from their father is very traumatic to them.
Cog