Cheating does not “just happen.”
Even those cheating events that happen with alcohol involved are evidence of what is already in the heart. The substance just lowered their inhibitions to act on the sin in their hearts.
What is worse is those cheaters–who are many–who plan out months or years of cheating. It is hard to come back from that. Habits–sin habits–die hard.
Keep that in mind if you are thinking about “reconciliation.” This person made sinful choices that flowed from their heart and developed into sinful habits. Repentance requires some serious work on their part!