Hermione liked playing with him like this, it sort of showed her that she wasn't the only one who truely enjoyed what they were doing together. He wasn't completly in control.
The power shifted a moment later when she groaned and pressed her wet sex against his hand through her knickers. She tried to keep her hand steady as he teased her but she bit her bottom lip and ground against his hand. Her hand jerked him in a slower pace as she looked down at it, twitching in her hand.
She was aching for him to fuck her again but she almost hated to admit it because she wasn't sure if she could take the smarmy look he would have on his face if she did. "Does it seem regulation to you?" she ask with half lidded eyes.