His face lit with a mischievous smirk as, without warning, he led her into the first steps of a waltz. He danced beautifully, leading with a strength Hermione found almost effortless to follow. They spun around the ballroom, her voluminous skirt swishing along a half second behind each movement as he led her through a series of turns then pulled her back in, laughing with delight. "I should have known better than to underestimate you," he said after the first dance had seamlessly transitioned into a second.