"I live here. For the moment, anyway. Donna's elsewhere. Needs a break from all the Time Lord vigor, I suppose," he said, eyes twinkling with amusement.

"She regenerated," the Doctor said, because it was obvious what was bothering Donna, and he still thought it was pretty nifty himself. He steps back a little, crossing his arms and letting them be affectionate. They deserved a bit of space, clearly. Not that he was going anywhere.