Hello,
As a woman, I think if the only thing holding her on is the "new system" thats then where you start. Have you seen Lance's video on "paridise earth"? If you cant get her to watch it, take note of all the holes in that idea and slowly bring them up to her. I NEVER knew or thought about that "Paridise earth" is NOT in the bible. It was shocking to me, just as much as it was shocking to me when the witnesses told me the trinity and hail mary wasn't in the bible. NO MORE SHOCKS FOR ME!
My husband left first as well, and in trying to stick to my position of staying..the house of cards fell. Sounds like you're really doing a great job, but however you present it, you have to make sure it almost feels to her like she's figuring it out herself... good LUCK!