She didn't receive your E-mail !"

The mother-in-law arrives home from the mall to find her son-in-law boiling angry and hurriedly packing his suitcase.

"What happened ?" she asks anxiously.

"What happened! I'll tell you what happened. I sent an email to my wife
telling her I was coming home today from my business trip. I get home,
and guess what I found?

Yes, your daughter, my wife, with a guy in our marital bed! This is
unforgivable, the end of our marriage. I'm done. I'm leaving forever !"

"Calm down, calm down!" says his mother-in-law. "There is something very
odd going on here. My daughter would never do such a thing! There must
be a simple explanation. I'll go speak to her immediately and find out
what happened."

Moments later, the mother-in-law comes back with a big smile.

"I told you there must be a simple explanation..... she didn't receive your E-mail !"