Sybian.

Harry took her hand and pulled her to the magical sybian.

"Ever seen anything like this?" He asked.

"I know what it is. No I never used one." She said quickly with small blush smile.

Harry grabbed some of the cuffes and collar from the rack. "Are you sure?"

Hermione nodded and held out her arms. Harry put the collar on and the cuffs. She was then led to the machine.

"This is magically sensitive. It can tell the exact amount of vibration to send a witch over in seconds." He said. "I'm going to put you on it and watch you lose your mind."

Hermione gulped but nodded. "Whatever you want."

Harry then secured her to the machine with chains and rope. She gripped the handles as she got use to the plastic cock inside her.

"Ready?"

She took a deep breath and nodded.

Harry flicked his wand and the machine came to life.

"Fuck!" She let out as a new level of pleasure overcame her.

Harry sat back smirking. Hearing Hermione curse was something he never thought he'd witness. Now he held his wand and could control the settings easily. How long she would 'suffer' was up to debate.