In this story, the older sister can't resist jumping on her little sister's bed and tickling her. It doesn't take long for daddy to put an end to this, and tell them to stay in their own beds. But the two sisters quickly realize they can do as they're told, and still throw things at each other. The thing they decide to throw is underwear, and when one pair lands on Amy's head, they both end up laughing uncontrollably.
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