“Really, Sunset,” Vice-Principal Luna chided. “You're being very obstinate today.”

“Sorry, Vice-Pri... Principal Lunaaaaaahhh!” Sunset's last word turned into a gasp as a shudder rocked her body. “I.. I'm trying, but I c-can't s-s-seem to get over the... ooooh... the edge!”

“You did just fine with the first three,” Luna said. “You should be primed to finish.”

Sunset nodded. “S-Sorry.”

Luna sighed. “I suppose we'll just have to keep at it.”

“WHAT THE HELL?!” Twilight's voice echoed through the room as she and Celestia entered the vice-principal's office. All eyes turned to look at her, causing Twilight's face to blush a deep red.

“I'm so sorry!” Twilight gulped. “I was just... I mean... why is Sunset naked on your desk?!”

This was in fact the case. Sunset was very naked, sitting on a towel on top of the desk. Her legs were drawn up and spread, feet flat on the surface of the desk, allowing Luna, her hand encased in a latex glove, to quite clearly penetrate the redheaded girl with two fingers. Her thumb rested on Sunset's exposed clitoris. Strangely enough, Luna had seemed to be more interested in her computer monitor, which rested next to Sunset on the desk, than in what she was doing.

Or at least, that was the case before Twilight's shout interrupted things. Twilight pointed at the scene and looked up in shock at Celestia. “This is DEFINITELY not right!”

“No, it isn't,” Celestia agreed, causing Twilight to blink.

“Wait, what?” Twilight asked, now thoroughly confused. Celestia held up a hand.

“One moment, Twilight and I'll explain.” She turned her attention to Sunset. “Sunset, you should have been done by now.”

“She's been difficult today,” said Luna. “She's got one left but she seems to be having trouble getting there.”

Luna shifted her hand, and Sunset threw her head back letting out a moan. The teenager bit her bottom lip and made a frustrated noise.

“:I don-- aaaah! – don't know what's wrong!” Sunset moaned again. “I'm so c-close.”

Celestia folded her arms and made an exasperated noise. “Sunset... are you trying to get me to do what we had to do last month?”

Sunset shook her head rapidly. Luna had returned to work and was fiercely pounding her fingers in and out of Sunset's well lubricated pussy. Twilight felt her head swim at the heady mix of scents and sounds coming from her new friend.

“Because,” Celestia said. “If I have to, I will get Nurse Redheart in here and you know you won't like it if she has to deal with you.”

“N-no!” Sunset stammered. Her hips began to rock in time with Luna's fingers. “D-Don't. I'll be – I'll be a good – AHH! – g-good girl, Principal Celestia.”

“And good girls don't evade their releases,” Celestia said firmly. “Now, if you don't release by the time I count down from ten, I will call Nurse Redheart and that bottom of yours is going to regret it. Ten...”

“Oh noooo!” Sunset leaned back, putting her palms flat on the desk and bracing her arms.

“Nine...”

Twilight goggled as Sunset pushed herself up on her hands and feet in a “crabwalk” position and began bouncing her hips up against Luna's fingers. Luna herself began pumping Sunset harder, running her thumb in circles over the girl's clit.

“Eight...”

“Please...” Sunset whimpered. “Please... I'm a good girl...”

“Not from where I'm standing. A good girl would have released by now,” Celestia said firmly. “Seven.”

Sunset let out another moan. Luna gave her sister a mischievous smirk. “Perhaps Sunset Shimmer could do with another nude week. It seemed to work very well after the Fall Formal.”

“Noooooo!” Sunset's voice came out as a mix of a moan and a whine. “Please don't make me be naked all the time again!”

“An excellent idea, Luna,” said Celestia. “Maybe some more public spanking too. That should remind her what happens to naughty girls who refuse to release. Six.”

“Oh god!” Sunset wailed. She began rocking her hips even harder, desperate to get her final release. “No spankings! Please!”

Celestia gave a wicked grin of her own. “Then I suggest you finish your releases, Sunset. Or not only will I let Nurse Redheart at your bottom, it will be bright red when I do. Four.”

“Four?!” Sunset yelped. She tilted her head back, looking at Celestia upside down. “What happened to five?!”

Celestia quirked an eyebrow. “Three.”

Sunset let out a large gulp and looked pleadingly at Luna. “Help me, please, V-vice-Principal Lu-Lunaaaaaa!”

“You know what you have to do, Sunset,” said Luna. She pulled her fingers out, causing Sunset to let out a desperate whine.

“Two,” Celestia intoned, her voice promising unpleasant results very soon.

“Pleaaaaaaaaaase!' Sunset cried. “ I'm a good girl! I need help! Help me cum!”

“Luna gave Sunset a stern look. “Help you what?”

“Release! Help me release! I need to release! I'm soooo close! Please!”

“One,” Celestia said sharply. “This is your last chance, Sunset!”

“PLEAAAAAAASE!” Sunset begged. Luna grinned and slid her fingers back inside Sunset, the palm of her hand turned up this time. She curled her fingers upward and swiftly rubbed the ridged area above the girl's entrance, while simultaneously flicking Sunset's clit. Sunset's eyes rolled back in her head and she collapsed on her back on the desk, letting out a scream of pleasure that caused her entire body to shake. Her thighs quivered madly as her collapse pulled her off the vice-principal's hand. She cried out inarticulate squeals, cries, and moans as her orgasm rocketed through her body.

After a few moments, the wave subsided and Sunset collapsed fully onto the desk, her head hanging upside down off the edge. Sweat glistened on her and Twilight found herself gazing at Sunset's breasts, thighs, and lips.

Sunset's eyes opened, causing Twilight to yelp in surprise. Sunset gave her a mellow, slightly dazed, grin.

“So, I guess we better explain what this was all about, huh?”

Author's Note

Yes, I will explain what the hell that was all about in the next chapter.

I suppose I should say that this is an extremely unrealistic sex fantasy story, and that I certainly would not condone anything like this in real life. Don't think about real world implications too hard on this one, kay?