Disciplinary Action/Disciplinary Office/Before school/Visit/School/Practical interview/Pause/Delay/Order/Tatiana/Order her/Restraint/Chains strip/Gag
You decide to gag her. She has already bit you once, and you don't want her having that opportunity again when it comes time to let her out of these cuffs when it's her turn.
Fortunately for you, there are a few ball-gags already hung up on the door of the closet, and in a variety of size options. Once again, you have no idea how they got child size options. You take down one you think would be about right for her eight year old mouth and bring it toward her face. "Now, this ball part here is supposed to go inside your mouth. This is because you bit me, it will keep you from being able to do it again. Understand?" You as her, to which she nods and silently opens her mouth, and you strap it around her head.
As Mr. Granville is watching this, he suddenly decides to speak up. "Those ones in the closet are designed to be locked on, the key is also on this key ring I used to open the closet," he said, showing you the key ring and pulling out a specialty looking key that's just a single thin strip of metal, indicating it's probably not a tumbler-style lock but just a small and simple button that can't be accessed without a thin piece of metal like that.
You nod in acknowledgement. This will remove another possible concern later.
Now then...