Another good question to ask- Do the JWs believe that Jehovah has preserved the Bible all these years? If so, then why didn't He make sure that His name remained in the New Testament? Why did the JWs have to insert it back in? The claim to have restored it, when in fact, it was never in the New Testament to begin with. You're doing a good job. Stay calm, and continue to ask questions and make her think. And by the way- welcome to the forum!
kj