I shared this one with a few people before Christmas, but now I can tell everyone else. I'll give away the ending now: Wayne had no idea I had really gotten him an iPod.
I got Wayne an iPod for Christmas. Lindsey was with me when I bought it (can't be helped sometimes) so I told her that it was a secret that Daddy was getting it and not to tell him. She got preoccupied with other things before we got home so she promptly forgot about it and never said a word.
Two weekends ago she was pretending that she was going to go to the mall. She put on her hat and mittens and her purse over her shoulder, and came up to Wayne and said, "Daddy. I am going to the mall to see Santa. What would you like for Christmas?"
Wayne said, "I would like an iPod."
Lindsey replied, "Oh! Mommy already bought one for you!"
Of course, I couldn't rush in to the room and stop this exchange or Wayne would know that truly I HAD bought him an iPod and this wasn't just Lindsey making things up. But later she came in to the kitchen and I motioned her over.
"Lindsey!" I whispered. "Why did you tell Daddy that I bought him an iPod? Remember, it's supposed to be a surprise!"
She said, "But Mommy, he wants to ask Santa for one, and I don't want him to get two!"