I think she is also in a terrible dilemma, her natural self wants you, wants to be with you and wants to have a normal relationship with you. Her cult self is terrified of doing what is wrong and dying at armageddon, losing face, losing her family. I married outside the "truth" but got my husband "in" after 5 years thinking our life would be great, unfortunately 25 years on, the legacy is too great. Now my daughter is married and also trapped in this cult. I fund out about the organization, but its very hard to try to tell your family!
The cost is too great...............if you can get her to question it and research it for herself, maybe you have a chance. But you will NEVER convince her its not the truth. It will ruin both your lives