She'd said Itachi'd been there, but because she'd also said that people left at random, it meant he could possibly come back. A small smirk found its way to his face. If and when Itachi made a reappearance, Sasuke wanted to be there to welcome him with open arms, zap him to paralysis, gouge his eyes out, and make him suffer.
But first, he wanted to know why the ottsel mentioned that she had 'one hell of a punch' and that listening to her or pretending he knew her would save his skin. "I take it you have a rather volatile personality?"
If their truce was going to work, he wanted to know what he was dealing with... and how best to avoid becoming a casualty.