Thats a paddlin!
At eighteen years old, Twilight was juuuust finishing her last semester of high school. A perfect record. Straight A's, no tardies, and no absences. Things would have been absolutely spotless in her career except for one teeny, tiny, itty bitty detail.
She blew up the chemistry lab.
It had been an accident, of course, but still, a gaping hole in the side of the building was a gaping hole in the side of the building.
Twilight whimpered shyly, looking up at principal Celestia with a quiet shudder, hoping against hope the stern looking pony would grant her leniency, or at least let her off with a note to her parents. But it had grown far to late for that. Quietly, sheepishly, the young brainy pony climbed across the principals lap, trembling nervously as the elder pony slowly slid her skirt up along her thighs. The pony's bottom was wrapped in her favorite "Care Bear" panties, which clung to the twin, plump cheeks, well rounded from over indulging in studying and cake, and bounced with a quiet wobble whenever she moved. The bottom halves of the two globes peeked out casually from the hem of her panties- initially, a move she thought would endure Flash to finally try something, but she'd never imagined it would be her principal getting an eyeful!
"I, I'm sorry...ma'am. " Twilight gulped nervously, knowing in the depths of her mind the flimsy apology would do little good. She trembled, wriggling nervously as the principal pony's fingers traveled quietly along the rounded curves; exploring the purple pony's bottom with an oddly gentle touch that roamed across the thin fabric of her panties, and sent shivers along her spine. She'd longed to be touched like this; dreamed of it, but not from the principal! Not Celestia! Regardless, her body reacted on its own, the gentle motions of the strong fingertips triggered the response she was hoping Flash would; and the scent of arousal was beginning to pitch itself into the air. The young pony blushed helplessly, clenching her fingers into tight fists while the elder mare's fingers dipped casually along the darkened ravine crafted by the twin cheeks of Twilight's bottom. Not there- don't touch there! Why couldn't she just get it over with?! Twilight whimpered, reaching up to tug her ears quietly, hoping that the other pony wouldn't smell her scent- she wouldn't see the quiet camel toe now pressed against the crotch of her panties; wouldn't feel the delicate wiggle and soft movements she was forcing her to make...
WHAP!
The first clap came as a shock. She hadn't been expecting it at all with the way Celestia had been coaxing her into a sense of security (And horrible embarrassment) but she soon realized that was the entire point- she was making sure she wouldn't be able to anticipate the blows. The next crash across her plump, purple bottom cheeks forced a yelp from the pony, followed by a sheepish squeal that echoed across the room and rebounded against her ears. Her rump jiggled with a delightful bounce; trembling under each firm strike of the mare's skilled fingertips and forcing a jolt of pain that rippled across either globe. There was no doubt about it now; Twilight was wet. Soaked in fact. Each firm clap across her soft, well rounded bottom elected a secret jolt of secondary pleasure underlining the first jolt of pain. She kicked her legs out, feeling the sensation of her soft, buttery pussy lips grinding together, damp with the hidden sensations of need that sprung from Celestia' firm touch. The dark scent was spicy with the hint of fruit was weaving its way into the air now, more and more, stronger and stronger, until the young girl was sure there was no way Celestia didn't realize what she was doing to her. She knew. She HAD to know...and then she was sure of it.
The purple pony squealed, her cheeks turning a hot shade of dark crimson when she felt the other pony's fingers dig under the waist band of her panties- tugging them down dutifully to her knees, exposing her round bare bottom to her vengeful gaze. Her cheeks; now tinged with a soft kiss of rose, arched and wiggled shyly from side to side, and the wet, matted fur of her inner thighs glistened with an obvious sheen of arousal. The pony squeaked, covering her face with both hooves and wished the world would swallow her right then and there...
Twilight's bare bottom bounced boldly under the burning blasts of brilliant skill Celestia' fingers rapidly applied to her upturned rump. Each firm stroke forced the ponys rump to raise up with a hardy jiggle, dancing with an almost erotic wobble under the hot-tempered pony's fingers. The blows came so fast now that even if Twilight could have prepared- braced herself, it would have done nothing for her. Nothing to help the way her cheeks parted slightly every time, showing off the tight, hidden opening nestled between her roasting buns, or the way her glistening pussy was leaving a small mark of scented heat on Celestia inner thigh. She squeaked, clenching her toes quietly and arched her back, unsure what was worse now: The spanking or the horrible embarrassment that accompanied it with the way her body was reacting. Each firm blow caused a helpless arch and wiggle, driving the poor pony to tears that raced eagerly down her cheeks.
She was only dimly aware of Celestia' reprimand now; her voice drowned out by the jolt of pain and echoing smacks across her buttocks. She was saying something and so was she. Slowly she realized not only had she been crying, but she'd been sputtering helpless apologies one after another after another for a few minutes now. Her bottom cheeks had turned from a cheerful shade of purple to a sharp burning red, damn near glowing and painful. It had nearly been a minute in passing when she realized the spanking had finally come to an end, the elder pony was still holding her firmly in her lap, but her fingers no longer reigned down the force of justice across her bare behind. Instead, she was simply holding her against her chest, stroking her fingertips along her lower back quietly- And that's when she said it- fatal words that would forever ring in horror in Twilight's ears:
"Are you prepared for the next part of your punishment?"