"Divorce is not an option for me. I want the best for our children and divorce will hurt our children.
I know we have a marriage worth saving, and I would really like us to try together. Your affair is huring both of us and is not heatlhy. I think it's best that we don't have any contact of any kind until you end your affair. Any and all contact must be through your mom until you end your affair."
I didn't change much just some wording. I usually get to wordy and emotional and I like how to the point your draft letter was.
Me: 28 H: 32 1st marriage 4 both 1 1/2 year married 2gether for 9 1S: 6months 1stepson: 2yo