Anniversary

"Hey, Sam, do you know that daddy and I have our anniversary on Thursday?"
"What's that?"
"It's when daddy and I got married."
Pause for thought.
"I"m married, too, you know."
"Oh, really? Who are you married to?"
"Mommy!"
"Oh, you're married to mommy?"
"Yeah! When's our anniversary?"
"I don't know. When do you think it is?"
"Monday!"