That isn't fair on you, and again will create stress and a stress point in the relationship. Topics like race and polygamy have been "adequately" explained away, so I don't think we'd get anywhere discussing those things. If you like living on someone else's coat times, them by all means. That is the shit storm on the road ahead of you.
There are so many potential problems they would fill a book. Based on what you have written about your GF, my opinion is that you should cut your losses and move on. Mormonism is an all-in religion. The most damning information is in the footnotes of the essays. I have to day that I totally agree!. My surgeon husband of 12 years just made himself a "free agent" when he cheated on me and our three kids with a gal 12 years his junior. My advice would be to become as familiar as possible with her schedule, and then plan activities that will allow you both to get to know each other better, avoid movies. I have this brain trapped after all these years.