Thank you, this sounds like very good advice for how to lead someone down the path.

But given that she is reluctant to go down the path, do I want to lead her down it? She already believes that I can defend my views better than she can her's. She probably even believes that my views are closer to the truth.

My guess is that she is reluctant to discuss and evaluate the fundamental facts of existence and our values, precisely because she cherishes certain aspects of her current worldview that she correctly believes she is likely to lose. I think its plausible that she'll end up less happy, and maybe less productive, after hearing about the preference utilitarianism and the opportunity cost of spending $80 to have flowers delivered to a friend (note: I'd never try to stop her from doing it, I'd just like to explain why I'm not going to) or after explaining why the idea that people have souls is incoherent (note: I would never say something that strongly. As you suggest I'd want to build up to it slowly, by asking questions and letting the conclusions fall out of the discussion.)

Religious people report being happier. By many measures they also do more "good works." I wouldn't be surprised if the same were true of deontologists vs. consequentialists.

Do I really have reason to believe she'll benefit from serious detailed discussion of our respective worldviews?