Work on her version of the "truth."Reason with her as follows:
"Many are fearful of even glancing at works critical of JW doctrine believing that something bad will happen to them, but what they really should be afraid of is not paying attention to close criticism because they the risk of committing an unforgivable sin. When the Pharisees attributed the source of Jesus' power to heal and drive out demons to satan rather than the Holy Spirit they blasphemed the Holy Spirit and committed what some argue is the only unforgivable sin (Matt. 12:22-32).
It is no great secret that the Jehovah's Witnesses attribute the Catholic and Protestant churches' authority to heal, exorcize and minister to the power of satan. But if the Jehovah's Witnesses are wrong, which they are, they are blaspheming the Holy Spirit; this includes all Jehovah's Witnesses who advocate these beliefs through the dissemination of Watchtower Bible and Tract Society literature related to these issues. Rather than dissuading continuous inquiry into the nature and scope of truth, the Bible encourages it for as the apostle Paul cautioned, "be sure of all things.""
Then, sit her down and force her to read the following section on the divinity of Christ, and the Trinity doctrine which appears to be the biggest obstacle to their objectivity. Best to print it out.
Then prove to her that there is not such thing as the 144000 anointed JWs as they understand it.
Then, show her how 607 cannot be true, no matter what they tell her.
And if that doesn't do it, consider commiting her to an institution for the non-objective and stubborn.