Thank you all for the prayers and advice. There are many more details of this situation that simply will not fit in a forum post. However, in an attempt to address some of the responses I will tell a little more.
The cheating wife has been confronted by friend 1’s wife, they are sisters. Cheating wife refused to stop the relationship, but she agreed not to do it in front of her children. However we think she may have just said this so that people are not snooping in her business.
I realize that friend 2 may know about this, but I don’t think this is the case. I think he suspects something is not right, and instead of investigating he just ignores all signs. This worries me about his mental well being, he may take this news very hard.
I beleive that friend 1 should be the person to tell friend 2, but I don’t think he has the courage to do so. We have talked about it, and he keeps going back to the anonomous note idea. If friend 2 is going to find out from a friend it will have to be from me.
I realize that this may not be any of my business, and I may not be able to put this into words but I will try. Friend 2 is in pain and does not yet realize it, the longer he goes without knowing what is going on the more painfull it will be when he does find out. For this reason I feel I need to tell him. I am not trying to mettle in his business for the sake of drama, I care for him and I want to help him.
Again thank you all for the comments and prayers.