A doggy

Setting: Mom tucking Emma in for the night – after a particularly precocious day.
Mom: "Em, can you do Mom a favor, please?"
Emma: "What?"
Mom: "You were kinda rough on Dad today. Can you try to be a good girl for Dad tomorrow."
Emma: "No."
Mom: "Missy, can you try being kind?"
Emma: "No."
Mom (persisting): "Can you try being gentle?"
Emma: "No."
Mom (persuading): "Patient?"
Emma: "No."
Mom (searching for another virtue): "Nice?"
Emma: "No."
Mom (giving it her all): "Loving?"
Emma (with a lilt): "Nooooooo."
Mom: "Emma, what do you want to be?"
Emma: "A doggy."