Im also trying to free my husband. Your idea has merit, if you think she would go for that. Today I too had a 'talk' with my hubby, but I was very open and said "Look, I need to share some things with you that Ive discovered, but I dont want you to think Im trying to force you to change your mind about the faith, more that I want you to see what things have opened my eyes, so that they might help you see the 'truth' too." This worked quite well actually, and he listened to the things I said (albeit answering with typical JW comebacks) but he ended the conversation but saying he'd have to do his own research!!! WIN!
Good luck with your endevour mate!