hokeypokey - take it slow with family. I would first ask yourself a question, "Is my wife really firm in the truth?"
This is not as an insult, but have you ever noticed before she had questions? Has she ever seen the truth as a hindrance to anything? Does she see the rules as oppressive.
I always saw in my wife a slight tinge toward the "truth" being oppresive. As I learned things I would ask her opinion on things but not in a dogmatic fashion. Eventually I found an article that she was livid about as most women would be. We talked and it opened the door. Then alot of other things expanded the gap in the door. When I decided to leave she was a little shaky at first but within the week she understood and soon followed.
First however, TAKE YOUR TIME AND BE SURE THAT YOU ARE READY FOR THE CHANGE!!!"