Not that I want to be proud of or unrepentant of sin.I just would like to be honest, I am a sinner but God calls me by my name. When I repent I know I have been forgiven. Unlike others who live their life in a lie.
You are not the exception to the rule. You will not cure them of cheating, because you're an awesome person. A cheater will always be a cheater. Especially, when they are cheating long into adult years.