You sound like a very loving and patient man. Its not easy living with a Bipolar person, I know about that. Its not easy living with someone obsessed with a religion like JW's either. You are coping with a lot and this must be very difficult for you and a unhappy time for you. In my opinion There is nothing much you can do but be patient and love her and hope she sees the Truth about the Lie . It just takes time and that is not easy for you. Your children are important but do you want them to grow up as JW's and shun you when they grow up if you leave the religion. That is a very important thing to consider.
Right now you will just have to be subtle and bite your tongue or cause problems and have her throw you to the wolves (elders), whew that is not easy. Quirky was talking about the same thing today. He wasn't sure if he was going to have to walk home or not after spewing out his thoughts and feelings to his wife.
I just feel so bad for you all out there that have spouses who are so into the religion. It does put a wedge between you and you all are to be admired for trying your best to cope with it.
I have been there done that, but I was the one that was the wife that was so into the religion because I thought I would die at Armageddon if I didn't stay in the religion. My poor husband who had never been a JW was so shocked when I went back into the religion. He coped as best he could, we had two little kids. He was patient and did not push me, I finally saw the light and left 7 years later. There is hope for some.