How many, Snape? Darcy doesn't wilt under that look precisely, but she does seem to yield in some subtle way. She'll take it all under advisement, without promising not to do the dumb thing. She's just so good at doing the dumb thing.

"It's hard to know how to avoid being a pawn when you aren't even sure what the game being played is," Darcy complains. Not to Severus, but generally.