I'm waiting for some good and faithful mormon couple to go to their bishop with the request that the husband be allowed to take the wife's older, widowed sister to the temple and to be sealed to her. She will not have been sealed to any other man.
They will tell the bishop that there will be no hanky-panky, that they're just doing it because it is their hearts' desire to spend eternity together. They will not live together nor commit bigamy.
Now, if the bishop is smart, he'll immediately bump them up to the SP!