Arthur laughs again, nodding in agreement because yes it would be awful. He has no doubt that Lancelot truly is just a genuinely nice guy with a very charming dog, but even to him the idea of that is a bit too good to be true. It's not nice to speak ill of your host though, even when you're joking, so he changes the subject.
no subject
"So," he says, "what do you do, Kathryn?"