Watch out for the "Mean Time"

Nettie and I were chatting a couple days ago and she asks about our plans for the day. Below you will find the conversation:

"Mommy, where are we going today?"
"Well, we have swimming lessons in about an hour. In the meantime you and Aubrie can play."
"Oh Mommy, this isn't the mean time!"

Not sure when the mean time is . . . but apparently, that wasn't it.