I am glad you checked in. I was beginning to get worried about you.
There is a way to talk to a person under the influence of brainwashing. Learn the techniques before you attempt to talk to your wife again (I oould care less about the elders. Sideline them as tactfully as you can and work on your marriage). I suggest a few months of peace to disarm her.
With practice I can now flip a Witness in and out of cult mode. There is a natural person trapped inside your wife and this is the person you want to encourage. A simple way to flip her out of cult mode is to bring up a hobby, interest, or talent that is uniquely her. Discuss that. You will notice her face will become more animated. This is the person you want to bring out more and more. You will flip her back in to cult mode by bringing up doctrine. Don't do that.
This is enough for a few months. Be natural, disarming.