Two guys were talking at the office.
"I've got a problem," said the first one.

"What is it?"

"My wife has done it to me again. I'm supposed to buy my mother-in-law a present for her birthday, from the two of us. And I am fresh out of ideas. I mean it's her mother, why can't she buy it?"

"What did you buy her last year?" the other one asked.

"Last year I bought her a very expensive cemetery plot."

"Hmm, it'll be hard to top that one," said the other.

The two guys couldn't come up with anything, so the son-in-law didn't buy his mother-in-law anything for her birthday.

When the big day arrived the next weekend, the mother-in-law was a bit upset. At the family gathering for her birthday, she announced out loud to everyone, "Thank you all for the wonderful gifts. Too bad my daughter and son-in-law weren't so thoughtful!"

Thinking quickly, the son-in-law responded, "Well, you haven't used the gift I gave you last year!"