The sparse decorations of the classroom meant that Hermione was not surprised to find herself lead to a squat low stool. The prominent dildo stood to attention on the chair. Narcissa smiled as her captive slowly impaled herself onto the wooden cock, the dildo-head filling her anal passage painfully. In self-satisfaction the older witch watched as the Mudblood’s legs splayed automatically to accommodate the low seat and the high heels. Training was always easiest when the student was eager to please or so cowed by punishment that they’d follow directions unquestioningly, but sometimes a slutty disposition just shone through.