There was a moment where she debated letting him kiss her... But it was, technically, their third date. And that was pretty impressive, holding out for a kiss for that long. She did her best not to let on that she had any hesitations about it, but she refused to fight it when it happened.
Hee Young stared up at him for several moments after he pulled away, no reaction in her eyes. She didn't need to react that way, her reaction was the fact that she leaned in for another lingering kiss.