Jenn sped up at her Master's praise, content in that she could do this for him. Being called a slut might have been offensive to others but not to Jenn, although it still made her blush, she took it as a compliment as it meant that she was doing her job right.
Her moans became louder as she kept fucking herself with his cock, hitting her against her spot as she took all of him inside her over and over again. She held herself back from cumming, she knew she was allowed to but doing so would make it harder for her to keep going. She always felt exhausted after a release, besides it wasn't her release that was the goal - it was her Masters.