"The worst ever," Sirius echoed, and his amusement was quite evident. He was still grinning, and was really half-tempted to kiss the tip of her nose, where the frosting ended.
He knew that he should have seen it coming when she chose to shove a slice of the cake into his face, but he didn't. He was abruptly assaulted with the taste, texture, and aroma of chocolate cake. However, when she went to pull away, he kept one hand around her waist, keeping her near, and the other went to cup her hand, keeping it pressed against his mouth as he started to eat bits of cake and frosting.
"In my mouth, eh?" he asked, even though he was scarcely comprehensible at the moment.