Paddy’s mother-in-law arrives home from shopping to find her son-in-law in a steaming rage and hurriedly packing his bags.
"What happened Paddy?" she asks anxiously.
"What happened? I'll tell you what happened. I sent an e-mail to my wife telling her I was coming home today from my fishing trip. I get home and guess what I found? Your daughter, my wife, Jean, naked with Joe Murphy in our marital bed.This is unforgivable! The end of our marriage. I'm done. I'm leaving forever."
"Ah now, calm down, calm down Paddy," says his mother-in-law. "There is something very odd going on here. Jean would never do such a thing. There must be a simple explanation. I'll go speak to her immediately and find out what happened."
Later, the mother-in-law comes back with a big smile.
"Paddy, there I told you there must be a simple explanation. She never got your e-mail."