He narrows his eyes, realizing she's right even for as much as it annoys him. It makes him think of his (probably inevitable) death by cancer and he sighs.

"Not used to worrying about the mundane." It's somehow much scarier to him than any demon, but he's quickly distracted again by her suggestion, looking down at the cards as he realizes it annoys him even more that she's right about the reading. "Oh, bollocks."

John is just going to haphazardly put the cards back in their velvet bag like he can pretend the whole thing never happened!!