I agree with ROOT. I kept alot of the information that I knew a secert believing that I was protecting my W and making it easier on her to comeback to me. I believe now that was the wrong move. I just enabled the A to continue and let my W walk all over me. Light was shed on the A on Friday for me, hopefully now that it is nolonger a secert it is not so inticing for my W.
Everyone's sitch is different and ultimately you need to make the call if you should confront her or not. I personnaly don't like lying and keeping secerts, I confronted once I had the proof.