Personally, I don't know why you need to respond at all.
Seriously, this man is whacked out of his f'ing mind.
He's banging a customer, and sends you this sililouqy about personal forgiveness?
Yuk...
The only response I have for him would be something along the lines of
"There is no separation between personal and professional integrity. One without the other means you have none. Lie and cheat or not professionally, you have done both personally and continue to do so. You have zero integrity with me, or with anyone else you are not currently doing in bed. Save your laments for someone easily fooled by words disguised as meaning."
Bill
"Don't tell me the sky is the limit when there are footprints on the moon."
