Keep it sincere and calm and pray about it. Pray for the Holy Spirit to guide you in what God is really teaching you. Let it lead you and know it may take her more time than it does you to see these things. At least it did me. Hubby saw things more quickly and more logically. I was more emotionally trapped. His logic helped me reason on things and not hide back behind the Watchtower because of fear.
Those were excellent questions you asked her. Her answers were wonderful and very revealing. She's evidently had doubts too. That's great. She is using her logic and not letting fear conquer her. She is strong and has courage. So do you. Don't ever forget that!