Jack goes to his friend Mike and says, "I'm sleeping with the
minister's wife. Can you keep him back in church for an hour
after service for me?"

Mike doesn't like it, but being a friend, he agrees. After the
service, Mike starts talking to the minister, asking him all
sorts of stupid questions, just to keep him occupied. Finally
the minister gets annoyed and asks Mike what he's really up
to. Mike, feeling guilty, finally confesses to the minister. "My
friend is sleeping with your wife right now, so he asked me
to keep you occupied."

The minister thinks for a minute, smiles, puts a brotherly
hand on Mike's shoulder and says, "You better hurry home
now. My wife died a year ago".