Again, if it was just getting some nookie on the side that’s one thing.
This guy abandoned his post.
He also lied about it! And far from remorseful, he is continuing his affair.
“Please forgive me for my sins, which I intent to continue as soon as I get out of here.” is not repentance, and Christian forgiveness doesn't include returning someone to the post they abandoned! You can forgive the thief who stole from your home, but not invite them back into it.