ANSWER: Polygamy is sin! God has ordained that marriage is between only two people, one man and one woman, until separated by death (Matthew 19:4-6; Romans 7:1-3). When a man and a woman are scripturally married and another person enters that relationship, all of those actively involved do so without the blessing of God. Further, all who knowingly participate in such a marriage are in sin as long as it continues. The above passages demand that all additional parties be excluded from the relationship, and that all who have participated come to repentance. Without obedient repentance (Luke 13:3; Acts 17:30), none can be saved or added to the Lord’s church (Acts 2:38; Acts 2:47). All who participate in any polygamous relationship are guilty of adultery! It does not follow then, because a first wife dies, that the second marriage becomes acceptable to God. The relationship between the second wife and the man remains adulterous, because God did not join them together in marriage as polygamists in the first place! If the second women became involved in the adulterous relationship after she became a Christian, she needs to repent (sever/cut-off/get out) of the relationship and pray God, if perhaps the thought of her heart may be forgiven (Acts 8:22). If she was baptized after becoming involved as the “second wife,” while remaining impenitent in the relationship, the baptism was invalid. She would have to, if this were the case, repent of all past sins, including the present relationship (Luke 13:3), confess Christ (Romans 10:9-10), and then be scripturally immersed (Acts 2:38). After having been obedient to God’s Word in whatever way is demanded she would then be free to scripturally marry. Extreme care, however, should be taken to assure that similar adulterous situations would not develop in the future. The man involved also needs to repent of polygamy and adultery, with no intent of ever being involved in such again. He too, then, would be free to marry!