Here is the best story about a mother-in-law and an affair ever. So this mother-in-law came to visit her daughter and son-in-law. But on her arrival she noticed the husband being very annoyed. What's wrong she asked? The husband explained that he was on a business trip and sent her daughter, his wife, an email to say that he will be home a day earlier. But when he arrived home, he found his wife in bed with another man. It's over. We are getting a divorce. The man said. So the mother-in-law said that her daughter would never do that, as she educated her better and something sounds wrong, but said that she will quickly go find out what's going on. So after a few minutes she came to her son-in-law laughing. I told you something must be wrong and that she would never do that. The mother-in-law then said, but she never got your email.