Not sure what your relationship status is like and your JW position l, however ..... you can use this to your advantage.
Ask her for a time frame, as in ... will Armageddon be here within 6 months? A year? See what she says. Tell her .... you KNOW with 100% confidence that in 6 months/ a year/ whatever her answer ... Armageddon will not have come and that this, though devastating to some will pass. Say you KNOW this 100% and that when her predicted time comes and this CV passes without the end of the world, if she wants to know HOW you knew it wasn’t going to lead to Armageddon you’d be happy to explain.
Then leave it be.
That is a powerful thing to do, be confident about it. When the time passes it will make her think 🤔. It can’t not.