Waste of time. You can't teach an adulterer, and it will make him appear weak and defensive. We also don't want him putting things out there IN WRITING right now, when his wife has repeatedly thrown around the "slander" charge. I'm sure his atty would agree with this.
No, he should keep his communications VERBAL at this point, and very general ("I'm sorry you feel that way." ; "Everything I'm doing, I'm doing to try and save my marriage." etc.).
He needs to focus on doing his legal and financial moves right now, and avoid any further drama that letters like this are only going to stir up.
