Act like a regular principal to see what she does

It occurs to you that it might be best not to leap into the retribution. It could be fun to play with her first.

"Michelle, I noticed something odd in your records that I was hoping you could explain. Pull up a seat."

If a principal had said that to most students, they'd have gotten very serious. Michelle smiles so mischievously that it seems like she's almost going to wink at you. She turns around and grabs the chair in front of your desk. Instead of pulling it closer, she pulls it around to your side of the desk and sits down. She's so close that her knee brushes yours.

Your cock goes rock hard.

"So Michelle," you say with strained calmness as you cover the tent in your pants, "I notice that you got an A on a test a couple months ago in English class. That's much better than you were doing before or since."

"Oh yeah!" she says. "I just really got into the material that day. We were covering some really great romantic poetry and I really responded to it."

Her hand moves to her knee, brushing your knee, making your cock respond as well. She seems so sincere, you know for a fact that she swiped someone else's test but looking into her green eyes...

"Michelle, I also noticed that another girl, one who usually gets As, failed that test and got into trouble for saying it was your fault. Can you explain that?"

The curly haired girl closes her eyes and shrugs, a move that shifts her large chest around in delightful ways. "I'm not sure. Jenny must have had a hard day and blanked. Sometimes the really bright students stress out too much, you know? I guess when she got her paper back she freaked and tried to come up with an excuse for why she did so badly."

The brown haired girl leans closer and puts her hand on your knee conspiratorially. "It really hurt my feelings when she accused me of stealing her test paper. The teacher was very understanding." Her hand slowly works its way up your leg. "I can see that you're very understanding, too. Is there any way I can thank you for being so understanding?"

The urge to tell her to forget the whole thing is overwhelming. Your cock desperately believes that she's innocent, drowning out objections from your head. As she holds your gaze with her piercing eyes and holds your thigh with her firm hand, you're not even sure if she's asking to get off for the crime... or to get you off.