He glares at her thumb for a few seconds longer. At some point during those few seconds, it does hit him that he's being unreasonable. With all these other people here, too... Even with Xin Mo's dark influence roiling under his skin, realising what an absolutely terrible impression he's making is enough to make him rein it in.

... A bit, anyway.

"It's unnecessary," he says, less aggressively but still kind of sullen and petulant.