A man returned from a trip when a big storm hit their town, with crashing thunder and severe lightning. When he got home and into his bedroom at about 2 a.m., he found his two children in bed with his wife, apparently scared by the loud storm. He resigned himself to sleep in the guest bedroom that night.
The next day, he talked to the children, and explained that it was okay to sleep with Mom when the storm was bad, but, in the future, when he was expected home, please don't sleep with Mom that night. They said okay.
After his next trip several weeks later, his wife and the children picked him up in the terminal at the appointed time. Since the plane was late, everyone had come into the terminal to wait for his plane's arrival, along with hundreds of other folks waiting for their arriving passengers.
As he entered the waiting area, his son saw him and ran toward him shouting, "Hi, Dad! I've got some good news!" As he waved back, Dad said loudly, "What's the good news?"
"Nobody slept with Mommy while you were away this time!" the boy shouted. The airport became very quiet, as everyone in the waiting area looked at the man's son, then turned to him, and then searched the rest of the area to see if they could figure out exactly who his Mom was.