My wife and me were always united on every major decision. But on this one, she was ahead of me.
Although she was doing everything with me, (meetings, service, etc..) she told me later, her heart was not in it. She felt guilty teaching Bible studies to come aboard, knowing what was in store for them.
When I mentioned not going any more, she didn't argue which led to a very thought provoking discussion. The wall had come down and she unloaded about her true feelings. Wow, was I surprised!
Every JW has doubts, but doesn't always like to express those feelings and supresses them. Some stay the course because of habits, but once they are broken, it can unravel fast.
For you, it could be a long process, but I wouldn't give up the hope that the family will someday join you.
As time went on, the extended family has left the JW, all but two and they are the most self righteous SOB's you will ever meet. All are hoping they will stay in, and stay away from all of us. But those who have left have become very close to us, much more than when they were living the JW lie.