Summary: A "quiet move" in chess is described as an unassuming move that is not a capture, a check or a direct threat. Based on "Ancient History."
Mari thought she had been prepared for every possible gambit.
Shayera clearly wasn't savvy when it came to men. She was, Mari had smirked, rather caveman about it. She wouldn't have been surprised if Shayera had tried to club John upside the head and drag him back to her room. Mari had been so confident that she could counter any move Shayera would make that she actually enjoyed taunting the winged woman.
It was the single question from Shayera -- uttered to her and not to John -- that reset the board.
"Has he told you yet that we have a son?"