Hello Tourist with all due respect your statement to forget about mercy...come on man...regardless of the situation, we should show mercy and grace its not something that comes from us because no one truly human could show grace and mercy in an instance like that...but God can give us the strength to do so...mercy and grace isn't and should never be conditional...for what if God made mercy and Grace on our lives conditional? I sure as ever would be in big trouble! I'm sure you and everyone else here would too! Bluecell, if you are having trouble showing him the mercy and grace from God, other than Praying, I also suggest you supplement the prayer with reading the book of Hosea in the bible. It tells the beautiful (yet sad) story of Hosea and Gomer. God chose Hosea as the prophet to experience the pain HE was experiencing from the people's unfaithfulness to HIM by worshiping other Gods and not following his commandments. God commands Hosea to take up a woman, Gomer as a wife. She was known in the city as a harlot. I won't get further into it but its a beautiful and redeeming story of love and grace!
Yes your husband did cheat on you I will never agree with what he did and the fallout from him sinning against you and your family is heart breaking! However, even thought he doesn't deserve mercy or grace, its never about deserving but giving freely to all those that need it!
In Christ
Moses
PS: please don't take my comment in a negative light Tourist. I agree with you 99.9% of the time...except for this one time