She has also abandonded you absent ANY legal writ to do so.
Get an attorney NOW if you have to borrow the money.
This is going to get worse before it gets better. What state do you live in? If she and the children do not show back up by in the morning, report that they have been abducted. Play this as a no-nonsense case of chiild abuction by a religious cult know for child sexual abuse. When you do get your children back, have them examined for abuse right away by their doctor. Demonstrate that this is a serious concern from the get go.
Get in touch with me via PM. I want to help.
Francois