Who's Your Daddy?

Today the kids were eating lunch in the kitchen, and, apparently unbeknownst to Clara, Bridges was working upstairs, when we heard the mailman walk up the stairs to put the mail in our box.  

"Mommy, it's the mailman," Lee said.

"No, it's Daddy," Clara said.

"No, it's the mailman!" Lee insisted, and they went around a few more times, but Clara was adamant that it was in fact her Daddy arriving home.  

Hmmm......does she know something I don't know?