Someone points it out

"Um, Tanya..."

The Teacher looks up as she hears her name, her eyes locking on the Asian girl in the front row. "You okay?" she asks, still keeping locked in position.

"Your, um, your leggings..." the girl responds.

Tanya looks down, seeing her leggings locked around her knees and her cheeks instantly flush red. How the hell did that happen? How was she displaying her panties to the entire class, and what the fuck should she do now?