She expressed to me that she felt she had a man who would take the spiritual lead when she married me, and now things are not turning out how she thought
Just an idea...
Why not be the "spiritual head" of the family, just not a JW sense.
Read the Bible together, just the Bible, without the convoluted JW interpretations and commentaries. Read one of the gospels together, and discuss it afterward. Try to steer clear of the JW understandings that have been burned into your brains. Perhaps something along the lines of, "If I didn't have the JW understanding of these verses, I might come to XYZ conclusion. If you met me in service, and only had to use your Bible, how would you refute me?"
Perhaps, gradually, you can steer her to see that the JW interpretations are not the only reasonable ones, and in many cases are far less reasonable than others. From there, perhaps it is a shorter step to bringing her along with you.
I am thinking of trying something along those lines myself, but as I am a cautious sort, I want to plan it well before embarking.