[She's going to pretend that he didn't hear the other part. Maybe he was busy tinkering or reading or in the kitchen and just popped in to hear the last bit. She's pretending but she actually knows the truth. He gets a smile for ignoring it at the moment though.]

The main room of the flat, what you think 'bout paintin' it to look like the console room in the TARDIS? Think I got all the right colors.