Challenging boundaries was something Percy was not quite accustomed to, and a confusion arose. Staring at her smirking mouth, even a casual observer would be able to tell he wanted to kiss her again, but his brow furrowed. He straightened his neck to look this way and that at their surroundings. Just as Katie said, Muggles walked past to get to their own personal business without giving the pair a second thought. Still, something was not right. He wasn't yet comfortable.
Returning his attention to Katie, he smiled awkwardly and told her, "We better not delay. You don't want to miss the surprise I have in store." He lightly patted her arm as an indication that they should go, and took a step aside to show that he was ready to move.