For a moment, Ron's face was one of near mortification; he'd been worried that Hermione'd do exactly what she'd done. Suddenly, he was back on the Quidditch pitch, a group of Slytherins singing that bloody song at him while he let goal after goal go past him. Somehow he'd mucked this up before they'd even really done it. He frowned, a sinking feeling in his stomach.

The moment was thankfully short-lived when she kissed him again, smiling against his mouth as he felt his sudden nervousness subside a bit. It'd taken him a second to realize that she wasn't actually laughing at him. He felt like a complete and utter pillock again for having immediately expected the worst, then relieved, then glad again once he realized once more just what was about to happen.

It was more than a teaspoon's worth of emotions to feel at once, that was for sure.

"It's not funny, Hermione," Ron said pulling out of their kiss for a moment before his own resolve broke and he found himself laughing as well. "You're not supposed to laugh."

It was probably a moot statement at this point, as he was finding it difficult to keep a straight face even then.