Infidelity will always have its cost. It could be in terms of emotion or even in terms of finances. It is not cheap to cheat. Unmarried lovers have broken up because one or both partners were unfaithful. Perhaps the pain of infidelity involved in a marital affair is twice as intense because of the vows that spouses have taken to remain faithful to one another. The marriage could have been in a civil wedding or in church, it doesn’t matter, their union has been solemnized and legalized.  If anyone is interested, he or she could even file a suit. That is their right but it would only serve add to the pain.