There's a third option: Blood Atonement. In addition to polygamy, fundamentalist Mormon sects have this concept of Blood Atonement. (Remember LDS is, in their minds, a watered down version of Mormonism.
The concept is based on the idea that there are some sins so heinous that the blood of Christ isn't enough. (Unlike the latest declaration from the Pope that No sin, even abortion, is too great for God's forgiveness)
In the case of such heinous sins, only shedding the blood of the sinner will save his soul from eternal damnation. And those sins are murder, apostasy, covenant-breaking, adultery, and miscegenation.
Sounds more and more like Islam doesn't it?
Anyway, Meri just might have to be led out into the backyard and executed by firing squad. So her blood will soak into the hallowed ground of the cul-de-sac.