Steph certainly heard someone. It's a voice she knows, knew for years, but it still takes a moment for the name to find its way to her lips.

"Ezio."

Her friend. Some more profound than that, maybe, and her heart pounds uncomfortably hard as she turns to the stairs and starts rushing up them.

"Ezio!"

When she inevitably sees him, the first thing she does is fling herself at him. It's the only sensible thing to do.