Reality is there is only so much advice people on this board can give you based on this situation. If you truly believe that your children are in danger you should be contacting a lawyer to find out your rights and what your plan should be.
Little ones expect that their parents will do whatever it takes to protect them. If that means you have to take legal action then that is exactly what you should do.
As far as what stage your wife is in, it just doesn't matter. Your job is to live your life, take care of your children and do no harm.
~ swl
Look not mournfully into the past. It comes not back again. Wisely improve the present. It is thine. Go forth to meet the shadowy future, without fear. {Henry Wadsworth Longfellow}
