let her know her place

You turn the vibrators up as you start to talk.

  "Hey sis. How are you feeling?"

  She squirms more violently, as the vibrators pick up the pace.

  "Master? I mean mas..."

   She grows incredibly frustrated as she realizes she can't say your name. You feel you should make sure she understands.

  "I asked you a question slut. How are you feeling?"

  "I...I d-don't know. I'm scared. Why can't I say your name?"

  "Ask yourself that. Isn't it because you admitted to yourself what you really want?"

  You kick the vibrators up another notch, and she gasps, starting to get very frustrated that she can't come.

  "What are you talking about? Please, let me down?"

  You smile as you kick the vibrators up to max. You notice how much the ropes are digging into her skin, and you can tell all of the intense sensations are getting to her. Combined with the pain from having to stand on her toes, she won't last much longer.

   "Isn't there another question you should be asking right now? What do you really want to do."

   She can't take it anymore. You seem the incredible shame in her face, and she hates herself for what she's about to say.

  "Please let me cum master!"