She loses control...and her clothes.

The redhead- Sonja- stands up before Mallory does.
The brunette- Lena- moves behind the busty student.

She gags her with one hand and grabs her around the waist with the other.

Mallory is shocked.
What is going on here?!?

The duo exploit her fear and confusion to pull her to her feet.

"Let's see why they call it a boob tube," Sonja says, pulling down the front to expose the big old titties of the Principal's Daughter.

"It's a shame to hide these beauties," Lena says.
"Agreed. Let's just keep them exposed."

She pulls it down past her tits, handing around her waist.

"In fact, let's not stop there."

Lena uncovers Mallory's mouth and releases her, knowing that she won't be in a hurry to call for help or run now...

'What. The. Fuck?!?' Mallory thinks.