Mormons believe that the ancient prophets have been exalted to the highest kingdom in heaven, wherein marriages are eternal. Many of them had more than one wife, so there are people in heaven with multiple wives. Otherwise, exalted beings who did not practice polygamy on earth would have only one wife, since marriages are not performed in heaven. There are men who were sealed to one wife on earth, and the wife later died. If the man then was sealed to another wife on earth, he would have two wives in heaven, assuming they all were worthy of exaltation.