First time commenter here. After reading your story I had to chime in as this really touched close to home for me. My parents were both baptized but innactive when me and my siblings started studying, and shortly thereafter, started to be active and prominent in the congregation. There was a regular pioneer sister that decided to take us kids under her wing at the time but her primary focus was on my older sister. I know first hand the terrible things that were said about my parents, primarily my mother since she was "spiritually weak". Needless to say, this caused unbelievable tension in my family and caused so much pain to my mother. There was very much this tangible divide in the house and it was expressed that if I were to side with my mother I was not a good Christian. Basically, we were told that our mom was demon possessed and that she was evil and that this ego-centric, self-absorbed woman was our "spiritual mother". I am embarassed that I did not stand up for her and allowed this to happen but being only 13, I trusted my older sister. I remember how it all culminated late one night when my mom and sister got into a screaming match so heated that I thought that I was going to have to pull them off of one another. To this day my sister will not come to my parent's house and has little to no contact with them.
What I can tell you from experience is that the entire time my loyalties lied with my mother. I truly loved her and not this psycho woman. It felt wrong to be divided ans to harbor such ill-will towards her. I wish my mom would have pulled me aside and talked to me about it or did anything other than just let it happen. What I would encourage you to do is spend as much time with your children, looking for moments to discuss world topics or Biblical topics and do your best to show another side. I am sure that there are principles and doctrinal topics that they are confused over. Ask them questions on what they think. Bottom line is to get them to think for themselves and to question authority, namely that of the organization. You are their father first and foremost and you will have more of an impact on them then anyone in the kingdom hall. If you can, limit their association with them. This is your family and no one has the right to interfere with that. Fight for them and never give up on them no matter what happens. Above all, do everything with love. Love your kids and show them what real unconditional love is because they don't have it with the JW's.
Peace be with you and I really hope for the best for you and your family.