Wonder Where She Got That From?

This past week Madisen has been driving me crazy with the question: "Really?" It seems after every thing I say to her, a "really?" follows whether necessary or not.
"Madisen, I need you to clean up your room before going to a friends"
"Really?" yes really.
"Yes, you will be 11 when your sister turns 9."
"Really?" yes. really
"We're leaving to the store, hop in the car"
"Really?" For crying out loud! Really!!!!
Yesterday I was putting laundry away and she came in and told a whopper of a story, that lasted several minutes about what sort of valentines she was going to make, and who she would pass them out to at school. I listened for a while, but had my mind on other things, and just sort of tuned out. When she was done, she seemed to expect a response. Guess what genius return I heard myself come back with? That's right folks.
"Oh, really?"

Yes, Mom. Really.