Slave I Am, a petite beauty, is made to kneel, her arms bound behind her back, her eyes lowered in submission. Her mistress presents her with a choice: pleasure or pain. She chooses pleasure, and a monstrous dildo is secured to a fucking machine. Her mistress orders her to open wide, and she does, taking the dildo into her mouth, gagging slightly as it hits the back of her throat. Then, she's made to ride it, her body bouncing up and down, her tits jiggling, as the machine pounds her mercilessly. She's reduced to a moaning, writhing mess, her body covered in a sheen of sweat, her orgasm imminent.