Dear Queenie,
A friend of mine had an affair with a married man and it’s not the first time he has cheated on his wife. I happen to know that the wife suspected what was going on, but her husband managed to convince her that it wasn’t so.
Queenie, should I tell her the truth?—Undecided
Dear Undecided,
If there is a chance that the man’s wife has caught a sexually transmitted disease from him she should be told about the affair, but other than that stay out of it. Being forced to face the fact that her husband was/is not faithful to her would surely make her angry, and she might be just as angry at you for telling her about it as she is at him for his adultery.