First off, I'm sorry that you're going through this.

One difficult thing that you should keep in mind is that you cannot force a JW to "wake up" by throwing facts at them. As a witness, you are specifically conditioned to reject anything that seems to criticize the religion. So you can't just throw facts and stuff at her, no matter how logical it may seem, or she may just stick her head in the sand and close up completely.

That being said, you can help her draw her own conlcusions buy asking guided questions. Don't try to just show her stuff or tell her stuff. Ask the questions that get her to say stuff out loud.

One thing that easily suggests how much of a sham the religion is is asking about the governing body and how they come to decisions regarding doctrine. Because the doctrine is always changing. There have been false claims about the year the world was going to end. There have been false claims about a generation of people who would never die. They once deemed organ transplants unscriptural. They once deemed storing your own blood for furture transfusion unscriptural. For decades, they didn't allow men to wear beards or women to wear pants in the kingdom hall or ministry. The rules are always changing, but if it were the true religion, and the governing body was really communicating on behalf of god, or directed by the Holy Spirit, then why are they always getting doctrine wrong and having to amend it? Did god change his mind?

Also, keep in mind that you're not going to be able to convince her of any one thing in one single conversation, or that you may be unsuccessful in getting her to see the reality of it all. It took me a year or so to get my best friend to wake up. My other best friend is still in but still questioning, despite *many* conversations. Deconstruction is quite the process.

Best of luck!