Tease her a bit

You were now face-to-face with Glynda's privates, albeit covered by her adorable panties. To be honest, you never expected to be this close to the Headmisress, but hey! You weren't complaining as a thought crossed your mind to take off her panties in one swoop. You reach for the waistband towards Glynda's, childish, panties. Seriously, how can a stern teacher like Glynda Goodwitch wear something so cutesy underneath all that professionalism...wait a minute....You pause your attempt to strip Glynda and ponder. stripping Goodwitch does seem satisfying to you. However, embarrassing Glynda in front of her students would be even greater! So you came up with a new plan to humiliate her.

But the question is how? She already lost her skirt and pantyhose, courtesy by you, which left her with just her underwear and her shirt. So Glynda was basically half-naked by the looks of it.

Your eyes trailed down towards her crotch and a idea popped in your head. A naughty idea Your index finger moved towards the female teachers crotch and promptly poked it enticing Glynda to react to the sensation in a unexpected manner that you didn't anticipate.