Jenny squirmed in her chair, barely able to move. God, this was annoying! There wasn't anything she could do to convince Susan to untie her, but maybe the teacher would do something about it if she brought it to his attention.
"Alright class, settle down, settle down," Mr. Frederick said. "We've got a lot to cover today, so please keep the chatter to a minimum."
"Wait - Mr. Frederick! I need some help! Please, tell Susan to untie me!"
Unfortunately, it seemed the curse extended to the teacher as well, for her simply turned around with a weary expression on his face. "Miss Smith, what did I just say? We all know you enjoy being tied up like that. And I'm going to need you to be quiet."
"But - Mr. Frederick! Please! You can't just--"
"Susan, if you wouldn't mind?"
"Wait - what?!" Jenny said. She tried to turn her head, only to have Susan suddenly there. A bright red ball gag was in her hands. Jenny's eyes went wide and she tried to draw back, but Susan was too quick, and too strong. She managed to keep Jenny's mouth open, where she forced the gag in her mouth, securely fastening it around her head. Jenny let out a pitiful moan. Susan just tapped the side of her nose with a wink and massaged her breasts before returning to her seat, leaving Jenny feeling freshly humiliated and more than a little aroused at the contact.