We agree on honesty and kindness, it doesn't matter what inspires us to pursue that. You will be expected to condone but not attend events in the temple to which you will not be granted access. I'd try to see if she will leave the religion, and if not, you should break it off.
When we started dating, he was in his fellowship. She was a mormon and he finally joined the church at For 40 years there was a disconnect and she really viewed him as a lesser person cause he wasn't a member.