"Because I have been a bad student, Daddy Professor, ignoring my books to finger my wet pussy thinking of your cock stretching me out, and I need you to make me behave," I gasped, my hips bucking wildly against his hand as the pressure built unbearably, my clit pulsing under the heel of his palm. 

  Sweat broke out on my skin, making my blouse cling to my back, and I could feel my orgasm rushing closer, my toes curling in my sneakers as every nerve ending fired with pleasure.

  "That is correct, and now you may cum, but only if you scream it loud enough for me to believe you...