a girl (at any age) is a girl

The following exchange happened this morning at our house and is typical of just another day in paradise.

Kyler: Mom, can Kady wear these shoes? Do they actually fit her?
Me: Yes, they do.
Kyler: You mean, her foot is actually this big?
Me: Yes, babe, she's growing up.
Kady: MY FEET NO BIG, KYLER!