“For the married woman is bound by law to her husband while he is living; but if her husband dies, she is released from the law concerning the husband.
So then, if while her husband is living she is joined to another man, she shall be called an adulteress; but if her husband dies, she is free from the law, so that she is not an adulteress though she is joined to another man.” (Romans 7:2 – 3)
Only when the “husband” (or spouse) is “dead”… And… Only “in the Lord” (to a ‘believer’) —> A remarriage is “allowed” as this verse confirms it too:
“A wife is bound as long as her husband lives; but if her husband is dead, she is free to be married to whom she wishes, only in the Lord.” (1 Corinthians 7:39)
Christians practicing against this clearly practice “lawlessness”.