How did that happen??

Isabelle while playing: "Mama! I poop!"
Me: "Do you have to go poop?"
Isabelle: "No."
Me: "Is it too late?"
Isabelle: "No."
Me: "Did you already poop?"
Isabelle: "No."
Nick: "Do you have poop in your pants?"
Isabelle: "Yes."
Nick: "How did it get there?"
Isabelle: "Elwood put it there."

(For the record - she did NOT have poop in her pants and she DID go poop on the potty after this!)