1. I never said anything bad about you to the OW. 2. She's not a bad person.
And my all time favorite:
3. I want to be faithful to OW. I don't want this (cheating on my significant other) to happen again. Coming from a chronic cheater, this was a bit over the top for me!
Always do right. This will gratify some people, and astonish the rest. Mark Twain