I dont understand how this is going to help you. Does your W know that you plan to do this? Im not sure that she will even believe the letter, esp if its sent anonymously.

I understand the need for her to know, and I agree that she should know if her H is being a cad, but I dont know, it seems tragic for you to have a hand in the unravelling of their M, and to be taking a pleasure in it...

Maybe you could have your W do the no contact letter and send that instead.

I guess I gave the wrong finger to the wrong man...