Given that Lori was an active Mormon, I'm sure she asked God to confirm that Mark was the right spouse for her, and was sure she got an affirmative answer. It's not a reliable method. Even the LDS Church warns young adults to be on guard for "hormonal revelations". Unfortunately, young adult hormones being what they are, that's about the only kind of revelation most of them will get. God provided humans with brains, and might reasonably expect them to use said brains.
I find it amusing to see all the wild-a** guessing that goes on here about what Hackings thought or did, especially the guesses that are passed off as established fact. Your claim to know what God Himself told this poor woman is the best one yet. Thanks for the good laugh.
Marie Osmond comes from a very, very strongly religious Mormon family. I remember hearing about how excited she was to be married in the Mormon Temple in Salt Lake to her first husband (for eternity). Eternity turned out to be about, what, five years? He cheated, they divorced, she remarried. There are no guarantees and we all fail occasionally, but often times due to our OWN choices.
I was taught to run the other way, fast if some guy came up to me and said that he had a revelation that I was to be his wife.