Boy, has she heard this a time or two

Yesterday, as I was trying to praise Katherine for being so well-behaved and obedient, Nathan was in the background increasing the volume like he usually does when no one is acknowledging him.

She was gazing into my eyes, taking in all the praise I could give, then held up her finger, signaling me to "wait a second", turned around to her brother and said sternly:

"Nathan, please be quiet. What you are doing is called INTERUPPING!"

Then she calmly turned back around to me and said, "anyways."

Sister love

A major advantage to having an older sibling, especially one that thinks she's already a mommy...
You don't have to wait for your "biological" mom to finish unloading the car to help you play in the back yard.