You were playing the shell game (not for money) (yet) with Mommy. At one point, Mommy thought the game was over (justifiably so) and returned to the kitchen to finish preparing dinner.
You looked up at me, frowned and said, "I think I have a sad story to tell. Mommy walked away and didn't finish playing the shell game with me. This is so sad for me."
I alerted Mommy to her grave error and she quickly returned, duly chastened.