He finishes off her pants

Zack was more than pleased with how his plan to remove her pants had worked to his advantage, as they had fallen much easier than he anticipated. Its almost as if she had unbuttoned her pants to help me get them off. He thought to himself, just reinforcing his earlier thoughts that she wanted someone else to strip her. He appraised her appearance as he continued to unravel her shirt, which no longer covered her breasts at all.

Zack thought fast about his next move as Mackenzie hunched forward over her paper and he heard her frantic scribbling, bubbling in answers.
The way she was hunched forward to work quickly, Mackenzie had her feet under her chair, closer to Zack. Reaching out again with his feet, Zack carefully positioned his right foot between Mackenzie's ankles without touching her, and reached to grab the bottom of the cloth with between the toes of his left foot. After he was confident with the grip and maneuver, he once again shifted quickly, pulling both feet towards him, pulling Mackenzie's jeans back taut and then after a momentary shift, over and off her shoes as she pitched forward a little as her legs went back, toes down.

Mackenzie's eyes went wide as she had to steady herself with her arms against the sudden pull she felt as it pitched her forward against her test, leaving her resting on her forearms for a moment. No way! Noo! She internally squealed as she felt what she hoped wasn't the cloth of her jeans suddenly moving down below her ankles and then off over her sneakers as if something was pulling them backwards. She looked down to see her worst fears confirmed. Oh my god they're really gone! How did?! What?! Mackenzie was really worried now. How am I going to get out of here without my pants? She worried.

For his part, Zack was super pleased as he pulled his feet back, their prize intact. He shifted his right leg up and out to bring the jeans to his hands, he paused in unraveling the nearly-gone remains of Mackenzie's shirt (now really little more than a collar with sleeves), to take her jeans and slide them under his butt, hiding them from her view so she wouldn't find them at first, before waiting and watching the professor for a moment to stealthily place the jeans in his bag, where they joined Mackenzie's ruined panties.

Zack finished unraveling Mackenzie's shirt a moment later, leaving the embarassed redhead stunned and confused as she felt the sliver of cloth around her neck simply come apart and get whisked away behind her not unlike her panties. This left one article left on the exposed redhead, who had frozen in place trying to think of a way out of this.