She is a facebook friend of mine. Maybe what would be better is to start a blog on there sharing my forty yrs experience growing up as a Jehovah's Witness. That way she can at least see a different perspective.
That sounds like a good idea, put the information out there for her to see without being aggressive about it. Remember, she is being told to expect resistance, so the more gentle tactics are more likely to get good results. Leave that lifeline out where she will find it!
edited to add: Be sure to include links to articles on Freeminds, JWN, etc. in your blog. Make it easy to find the non-WT point of view.