When Jack came home, he found his wife was crying. "Your
mother insulted me," she sobbed.

"My mother? How could she do that when she is on vacation
on the other side of the world?" Jack asked.

"This morning a letter addressed to you arrived. I opened it
because I was curious."

"And?"

"At the end of the letter she had written: P.S. Dear Diane,
when you have finished reading this letter, don't forget to
give it to my son."