She gets kept after class

At 11:10 the instructor called a pause for today's lesson, informing the class that they would continue next time. The students began gathering their things and preparing to leave. A lot of the guys were either hard or semi-hard, and the girls who had been riding them throughout the class led them out of the room by their dicks, presumably to finish them off somewhere else like just outside in the hall.

Livvy made to leave as well, intending to give the cute boy a blowjob as thanks for her help when the instructor called her name. "Olivia, can you stay behind for a bit? I want to talk to you."

"Uhhh....sure," Livvy replied, a slowly sinking feeling in her gut. She looked over at the cute boy, almost as if she was asking for his help. He just gave her an apologetic smile, picked up his things, and sauntered out the room, his cock bobbing in front of him.

Livvy came up to the instructor, a middle-aged man who was fairly attractive and looked to have a decent body. He had a pointed look on his face as he spoke. "I know you were late to lecture, Olivia," he said, and Livvy groaned internally. "You know my lateness policy--now get into position."

Sighing, Livvy dropped her backpack and got onto her knees in front of him, watching the instructor unbuckle and lower his pants. Like the rest of him, his dick was decently-sized; not big but not small. Without prompt she leaned in and took him into her mouth, sucking him to hardness.

As soon as he was fully up, the instructor grasped Livvy's head in both hands and began to forcefully fuck her mouth and throat, the strength of his strokes making up for his length and girth as Livvy felt herself **** on his meat. She knew what he was trying to do, and hoped to get him there without too much delay so that she could go on her way.

It almost happened, as after a few minutes Livvy coughed hard, nearly (but not quite) retching around the cock pumping her throat. The instructor pulled himself out briefly, and thick strings of saliva and mucus fell from her parted lips. "Can--can I at least take my top off?" she asked, sounding a little hoarse. "I don't want to stain it."

The instructor considered for a moment, then nodded. "Go ahead." Gratefully, Livvy stripped off her crop top, her breasts bouncing free. As soon as it was off, the instructor pulled her back onto his dick and resumed throat-fucking her, now taking long moments to press her up against his crotch so that he lodged himself in her gullet.

This had the desired effect, with Livvy now retching almost violently. A few more powerful thrusts into her throat and the instructor yanked his cock all the way out. Livvy heaved and a tidal wave of vomit exploded from her mouth, pouring all down her naked front, covering her tits and running down her flat stomach. Thankfully it seemed to be all liquid, no chunks or anything.

Through watering eyes Livvy could see the instructor jerking himself furiously at the raunchy display and, wanting him to finish, shoved her hand into her mouth, her fingers jabbing into her throat. This brought another wave of liquid puke, jetting out from her stuffed mouth to spray the floor in front of her as well as running down her chin to add to the mess on her body. Grunting loudly, the instructor shot his load in several streams across Livvy's forehead and hair.

Having emptied her stomach twice in short succession, Livvy could do nothing but remain on her knees, recovering her breath and her guts. The instructor was already pulling his pants back up, though he let his cock hang out, not bothering with his zipper. Gathering his things, he said to Livvy, "Next time, don't be late. Or do, if you like this kind of thing." He headed to the lecture hall door, pausing only to add "From what I've seen about you online, giving head until you puke seems like a usual Tuesday night for you." Chuckling, he left the hall, leaving a vomit-covered Livvy on her knees.