Older Sister Methods

When me and my older sister were in some horrible nameless furniture/antique store with our mother once--possibly around ages 5 and 9--we were both complaining to a point where we were were both wailing and screeching--especially me. Then my sister--in an obvious ploy to drive me over the edge of a cliff--suddenly brightened and said, lying through her teeth, "I'M having a good time!" And I shrieked in frustration.