Today I caught her red-handed. I crept up the stairs as quickly as possible and as I peeked in the girls' room, it was all unfolding before me. There was The Bug, sound asleep on her back. And there was Belly, on her knees next to The Bug, very carefully lifting Buggy's shirt with her right forefinger extended about to go in for a serious DING-DONG! on the belly button. I whispered, "Psssssst!!" and Belly looked up at me in total shock. The speed with which she dropped The Bug's shirt and laid back down - even turning on her side away from The Bug - was astounding. I crawled onto the bed and snuggled up against her but there was no way she was going back to sleep. I mean, not with me shaking so hard with laughter.