coboardgirl wrote:
I don't know. I haven't been in that situation. As disgusting and deplorable as I think cheating is, I still can't say for sure. I KNOW I would talk to my sibling about it, but beyond that I have no idea. 

I don't think it's easy to say exactly what you'd do unless you'd been in that situation. 
Pretty much.  I know if I were the one being cheated on I would want somebody (my family, his family, a friend, the other woman, a complete stranger) to tell me so I wasn't the fool thinking we had a reasonably happy marriage and all the while he was getting some on the side.  But it would be really awkward to be the one to do the telling.  I suppose it might depend on how close I was to the innocent half of the couple.