So, I wonder how she can think this way and not have some impact on her marriage even if it is sub consciously.
Of course our deeply held beliefs impact our behavior, consciously or not.
Repressing, ignoring, denying them does not mean they go away.
I think your daughter reflects the opinions of many women in the LDS church.. at least those who love their husbands and enjoy the beauty of an intimate relationship.
They hope it is not really the way things are, they completely hate the very thought, they tell their husbands they will not be a part of it, and then try not to think about it.
Yet, the thought it there.. how could it not be?
"Knowing" that "God" commanded such an atrocity, that God could be so cruel, that God devised a plan so heart wrenching to women, and someday they may have to choose between complying with such a dispicable practice or not living in heaven is pretty tough. Best to not think about it. Best not to face the fact that church teachings are quite clear that, for those who are sealed, polygamy is part of the next life, like it or not.
For those women who want to believe God loves women, and that heaven may be a place where women are considered equal, the reality of polygamy creates confusion. It is nothing but disgusting... except, as I have mentioned, to those women who would rather not have a close, intimate, sexual relationship with a man.
~dancer~