Mary, who is blushing furiously, treats John to a vicious poke in the side.

"You're so horrible." Then to Harry. "He's here because Sherlock told him I'd brought home a lookalike. I'll be killing him later too, even if I have to get a chair."

She snatches the take-away stuff off John and starts putting it out on the coffee-table.

"Will someone go and poke about till they find plates? And by someone I mean John."

She tries to communicate to Harry how sorry she is that this is happening, but she's mainly doing it by staring at him meaningfully.