"Usually I do," Su replied, giving him a wicked grin of her own. "But you're the special exception to my punishing rule."
She moved quickly up the stairs to catch up with him, smiling the closer she caught. "Oh, I don't know... something devious and unexpected, I'd guess. Like-" She leaned in as if to kiss him, but at the last moment tilting her head back to playfully flick her tongue at the tip of his nose. The motion only lasted a second, before she pulled back with a giggle. "See! Bet you didn't expect that. And now, you've officially been Su-ed."