The devil’s toy plaything

After defeating the heroine you dragged them to a mysterious chamber in your halls, thinking about what to do with her until one of your minions arrive and tell you that the latest research ended in some result. The so called "Devil's toy" has been a success and you immediately use it on your latest trophy. Locked up all tightly and neatly you wait until she finally wakes up from her dreams, wishing her a good time and leaving her in the place for hours, days... weeks... potentially even forgetting her that she is in said chamber. The devil’s toy start to move, rotating the wheel with the knots right onto her still dripping pussy and it doesn’t take long until she moans lustfully in pleasure, cumming over and over again and each time melting a part of her brain more until she ends up as a submissive slut, ready to take every order from her new owner~