Fleur's eyebrow rose as Lavender told her she wanted it harder. The french woman did so and began bringing her hand down harder, now hearing more fully the sound as her hand hit the hot flesh. The only reason she had been holding back was because she didn't want to hurt Lavender. Well, in any way that Lavender didn't want.
As Lavender squirmed, Fleur thought nothing of it, her strong grip staying on Lavender's wrist and her hand coming steadily down on the Gryffindor's derriere.
"Oui." Fleur conceded, "You may. Eef you are good. I am almost done..." Fleur licked her lips at the idea of Lavender touching herself in front of her.