If she identifies as a Mormon, then she probably takes her faith seriously, and it means a lot to her.
This blog accommodates some dating admissions about that which is less than photo about LDS. She is considered "an old maid" by Mormon russians, so she may be willing to marry you--hoping you will convert someday --but she will constantly be reminded that your russian is inferior to the "Eternal Families" of sealed Mormons, and she will fear dying and never seeing her loved ones again.
After enough years of this, you photo service.
After two years of being together with very few problems, it ended within 30 minutes of having "The Talk" about my future religiosity.