Jack blinks, startled at her reaction, is she familiar with this ship? It takes him an extra second to start moving, ending up with him following her through the Serenity. Hang on, this isn't quite going as planned. "Wait, wait. Are you crew, here? You were on board here?"

He's trying to keep up as Kaylee keeps walking, but then he realizes the one thing to say that'll help confirm what's going on. "You know Inara Serra?"