Something unexpected and humiliating

Sarah reluctantly stands and begins to speak.

"Oh, uh, alright...sure. Well, the poem is about--"

That's all she manages before she interrupts herself mid-sentence.

"Oh no no no no!"

Her right hand rushes under her skirt but it's too late - a medium sized purple butt plug has lost its grip inside her and slipped out, bouncing off her chair onto the floor. This also suggests, you immediately realize, that she's probably not wearing any underwear under her skirt.

Sarah is now burying her face in her hands as her cheeks turn bright red.

You are sitting right behind Sarah, and got the best view. Moreover, the plug is now on the ground, right next to your desk. You can't resist- you reach down and pick it up, inspecting it.

"What the hell?!"

Tom, in the seat behind yours, is gobsmacked. Most of the other guys are also reeling, unable to believe what they just saw. The girls' reactions are all much more muted, almost as if they wondered if something like this was going to happen.

Mrs. Fletcher ignores Tom, and speaks directly to Sarah.

"Well well well, it looks like Mr. Doe has your butt plug, Sarah." She admonishes the embarrassed student. "You'd best thank him for getting it for you."

Sarah looks devastated, but nods her head. "Yes Mrs. Fletcher."

She turns around and crawls under your desk.

"What are you-" you don't even manage to finish your question before she has started unzipping your pants, making it very clear what her intention is to do.

Yes, moments later, your classmate Sarah is under your desk with your cock in her mouth, where it rapidly begins to harden.

"T-this is..." Tom begins to protest, barely able to get the words out.

"Completely within the school rules, Mr. Patel. Now, who can answer on Sarah's behalf while her mouth is full? Well volunteered..." Mrs. Fletcher searches around the room for another random victim. "...Miss Hill."

Jasmine Hill stands and begins to answer the question in Sarah's place. The boys are all amazed at what's just happened, but nobody interrupts. And so class continues normally, with the notable exception of the student silently fellating you under your desk. You sit there, paralyzed, the butt plug that had moments ago been inside her ass still in your hand.

What the hell did I write down?!