I love you and I married you for life. I want to remain married to you. I am willing and committed to doing what it takes to be the spouse you've always wanted and to address the things that I did wrong in our marriage.
The affair is so painful for me that it will destroy the love I have for you. In order to protect those feelings I must end all contact with you. As soon as the affair is over I would love to talk with you about our future. Until that time please respect my wish for no contact whatsoever in any form.
In an emergency you can reach me through ______. Arrangements for seeing children and handling finances are_____.
Sincerely, [YOUR NAME]
Thank you for sending this up whatnow.. I knew she had a sample one, but I didn't have it handy and I wanted to get something out fast..