Are people who remarry after a divorce on grounds less than sexual infidelity or abandonment living in adultery? The answer seems to be no. The words of Christ— “Anyone who marries the divorced woman commits adultery” (Matthew 5:32)—are in the aorist tense, indicating action specific in time, completed when it occurs. A couple divorced on less than biblical grounds commit adultery when they remarry, but their new marriage is valid.
The New Testament never instructs divorced and remarried people who become Christians to break up their latest marriage, something we might expect if people who remarry after a divorce are considered to be living in a state of perpetual adultery. In fact, Paul definitely instructed married Christians to remain in their present state if at all possible (1 Corinthians 7:15-24). Jesus acknowledged that the Samaritan woman had lived with five husbands, recognizing each marriage contract as a bona fide union (John 4).
Christians commit the sin of adultery when they remarry after a divorce that’s not based on infidelity, but once a new marriage begins they do not live in a continuing state of adultery.