My mother bought the nieces some Oreos.

[conuly]

And first they whined about how to split the cookies evenly, but then they thought about it and worked out that 14/2 = 7 cookies each. So Evangeline carefully counted out her seven cookies, and Ana decided to have hers later.

A few minutes down the line, when Ana took the sleeve of cookies, Evangeline said, apparently totally seriously:

"Those are your cookies, but be careful, that's my crumb!"

On top of the stack of cookies there was one cookie crumb.

Ana: Your crumb?!?
Evangeline: Yes. That's my crumb.
Ana: YOUR CRUMB?!?!?!?
Evangeline: My crumb.
Ana: Your... CRUMB????
Evangeline: MY CRUMB!
My mom: What's all this about? Ana, you're supposed to share evenly!
Ana: Yeah, but she says that's her crumb!
Evangeline: It is!
My mom: Your crumb?
Evangeline: That's what Ana said!