As much as I always profess that it's best to be honest with someone--and I am extremely honest at times--I'm not sure that i'd want someone to tell me nor would I want to be the one to tell. First off, it ruins the relationship between you and the person who's being cheated on. Not to mention, when your heart is involved, you're blinded. The person might not believe you to begin with and call you a liar. Meanwhile, the cheater is still cheating and the person being cheated on, although suspicious for a while, will more than likely have their fears eased with a pack of lies told by the cheater. In the end, the truth more than likely will prevail so as ****ty as it sounds, it's best not to get involved and let it be dealt with in its own time in it's own way.
Back when I was in high school, two of my teachers (one of whom I was friendly with) were having an affair. The female teacher was recently divorced and the male teacher, on his third marriage, had a wife and three children. Word got around big time (can't say any of us helped that situation--especially when it would happen IN school) and her reputation was totally tarnished (and she hadn't been working there very long). I'm still not sure whether or not his wife found out but good God, EVERYONE knew from the students to their coworkers and the administration--people that knew his wife. I felt bad for her. The year after I graduated, I saw them all in the mall together--he and his wife, arm and arm pushing their daughter in a stroller.
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