Welcome to the board!
I'm going to go out on a limb here. The fact that she is choosing to kick and scream about the merits of Witnesses- devoid of any family pressure- is because something else is wrong. Something else must be lacking in her life for her to be drawn to them. Its classic cult dynamics at work. Find out what that 'something' or 'somethings' is and you not only solve tthe WTS problem, but enrich your lives. I'm a big believer in a wholistic aproach to problems. Keep us posted in any case. -J