The tips of his ears went a little pink. "We are, yeah." There was a pride that infused his voice; look at me! I didn't screw it up this time!
"I gotta say though, you want to borrow the TARDIS, you have to ask, all right? No just gallivanting off on your own! She's very sensitive," the Doctor said, trying to force a serious expression on his face that just didn't quite sit right.
Blimey, could this get any more domestic? If he hadn't been so pleased with everything he'd be utterly disgusted.