Spencer mewled as a spike of arousal ran down her spine at the tone Carrow used with her. "Please professor..." she groaned, sounding almost desperate. "I...I need to come..." Her hips continued to buck. The finger was painful, but she was gradually getting used to it and enjoyed the feeling.
Feeling her professor's lips on her sex working so ferociously, Spencer did indeed writhe on the bed, her breath ragged and in small, sharp gasps.
"N-no...It's mean..." Spencer whined, too lost in her own pleasure to think clearly. "Please Professor Carrow, make me come..."