MDM:

My best friend got married two weeks ago. About an hour before the ceremony, I witnessed his now wife cheating on him.

I was in a state of absolute shock, and she did not see me. My boyfriend told me to keep quiet and stay out of his business and I did.

They got married and ever since then I have been feeling so guilty. This woman is unlikely to be faithful, but on the other hand, if I tell my friend about the affair, I could ruin his marriage and possibly our friendship.

Should I tell him what I know or let him deal with his our marriage on his own?

Meg