Disclaimer:
This is sexually explicit material. If you're not 18, you should stay away from this stuff.

Anyway...

[Fetishes Used in This Chapter]

Masturbation [Major]
Hypnosis/Mind Control [Major]
Pleasure Torture [Moderate-Major]
Mental Conditioning [Moderate]
Breast Expansion [Minor]

And with that, let's get this train wreck rollin'!

Sunset Shimmer, ex-conqueror of Canterlot High, sat in her kitchen as a pink blur raced to and fro, placing cupcake after cupcake in front of her.

'Sometimes,' Sunset thought to herself. 'this whole friendship thing seems like it's a lot more trouble than it's worth.'

Not that she wasn't grateful, of course. After the Fall Formal, she'd realised how horrible she'd been treating everyone, and how cruel she had truly become in her days since being Celestia's student. However, she was, in many ways, still the same old Sunset. She could be snarky. She could be manipulative. She could even be ruthless and cruel when she wanted to.
And, most importantly, she still craved power.
However, being around Twilight and her friends shad shown Sunset that there wasn't much point to power if she didn't have anyone there to share it with.
In short, there was no power without happiness.
So she began changing.
She stopped being cruel, ruthless, and manipulative - the snark stayed, because, honestly, the day Sunset Shimmer gave up her snark was the day she died - and started being kind, generous, and trustworthy.
But, most importantly, she still craved happiness, and through happiness, power.

"So!" Pinkie chirped, grinning as she quickly and efficiently derailed Sunset's train of thought so catastrophically the death toll approached the millions. "Which of these cupcakes d'you wanna bake?"

Sunset looked down at the plethora of pastries below her. There were cupcakes of every shape, size, color, and flavor. Some of them looked like simple affairs that could be cooked at home, while some were impossible to describe without creating at least two new adjectives from scratch.

"How about that one?" Pinkie said, indicating a very ungthious and frnciautory cupcake that seemed to be floating gently over the table. "That one's really fun to make."

"I think that one's a bit too... eldritch for my tastes, Pinkie." Sunset replied. "What about a batch of those?"

Sunset pointed to a small, round cupcake, topped with yellow frosting. She couldn't tell whether or not it was lemon or banana, but that was a gamble Sunset was willing to take.

"Aww, but that one's easy!" Pinkie complained.

"Keep in mind; this is the first time I've made cupcakes before." Sunset reminded Pinkie. "I think an easy cupcake like that should be perfect for a first-timer, don't you think?"

"You're right!" Pinkie said. "Especially seeing as how we're only making two of them. Just give me a few seconds to clear the table and we'll get started!"

As Pinkie began speeding around the room again, taking cupcakes from the table in exactly the same order she put them on in - a phenomenon eerily similar to a video being played in reverse - Sunset returned to her thoughts.

Yes, she still craved power and happiness. Yes, she also wanted her friends to have those things too. However, a trace of the old Sunset still wanted to be on top.
Her dreams were often filled with intense images; her friends being incredible people; doing incredible things. And she would be the best of them all, the shining star. Sunset Shimmer and her assistants, fighting evil.
Shortly after the Battle of the Bands, She'd begun picturing her and her friends, costumed like comic-book superheroes, standing triumphantly on a rooftop. Twilight and the others were arrayed behind her, and she was the centerpiece; the spotlight that made all the other lights shine brighter.
A tinge of another Sunset had emerged, then, and shifted the image a bit. The costumes grew tighter; the curves of the heroes larger, more pronounced, the eyes of her entourage empty and blank.
For, unbeknownst to Sunset, when she had come through the mirror, she was put into the body of a girl just entering puberty.
And her libido had grown just as much as the rest of her over the years.

Yes, she could definitely see it; Sunset and her troop of hypnotized sluts, ready to-

Sunset shook her head. Heroes. She definitely meant heroes.
Although the former idea was a lot more appealing than the latter...

"?tesnuS, ydeaR" Pinkie called, before shaking her head.

"I mean 'Ready, Sunset?" she reiterated, giving her confused friend a wink.

Sunset nodded, and Pinkie began singing as she produced ingredient after mixing bowl after whisk.

It's a piece of cake to bake a pretty cake
If the way is ha-zy...

'Oh, Celestia.' Sunset groaned to herself. 'The baking song.'

Right then and there, Sunset decided to take Pinkie first.

The truth was; many people assumed that since she wasn't Celestia's student for very long, she hadn't picked up any of Twilight's habits; her careful study, her fascination with magic...
They were wrong.
Sunset had been a diligent student, learning the value of study, and she'd developed a laser-like focus.
And, ever since the Fall Formal, she had been studying two very special subjects.

She had first come across the first in a library book she passed on her way to the Fantasy section; the bright, colorful cover, adorned with spirals and watches, had caught her eye, and she'd picked up, skimmed, and checked out 'Hypnosis and Suggestion: A Beginner's Guide'.
Since then, she'd devoured anything she could get her hands on that had to do with hypnosis. She had no idea why - she hadn't had this fascination before the Fall Formal - but hypnotism, mind control; anything that involved the removal of someone's free will...
It made her feel strangely good, especially in a certain place.
This feeling had led her to the world of kink. She'd quickly devoured BDSM, as well as pet play, roleplay, and various other intimate forms of recreation, untl she'd discovered the common thread that linked the two.
Her nights from then on were filled with pleasure that was nothing short of amazing.
And so she had created a plan; she would show her friends just how amazing hypnosis and kink could be. She would share this power, and this happiness.
The mental image of her and her friends had shifted, then, to them arrayed kneeling naked before her, their eyes blank and their mouths open, ready to serve and pleasure their Mistress. Of course, she would ask for their approval - conveniently after she'd already placed some triggers - but still she longed for the days she could - no, would spend as Sunset Shimmer, Hypno-Mistress, playing with her loyal hypnotized sluts.

"Hold up, Pinkie." Sunset said. "I have a... special ingredient I wanna add to the frosting, if that's all right with you."

"Sure!" Pinkie said, proffering the bowl of frosting.

Sunset reached into her backpack and took out a small vial, filled with a chemical she had created back at her apartment. Laced with various pheremones, the liquid inside should, if sunset was correct, have a very... positive effect on Pinkie Pie.

Smiling warmly at her friend, Sunset poured the vial into the frosting, and Pinkie went back to her mixing, singing as she went.

Sunset waited patiently until the cupcakes were done baking, then took the bowl of frosting from Pinkie and went to work, coating one of the two cupcakes completely with frosting, making a veritable mountain of lemon? - honestly, it could be banana - flavored goodness.

"Oops!" she deadpanned, when she was done. "I am such a klutz; I have accidentally used so much frosting on this one that I have forgotten to frost my own cupcake, and now the frosting is all gone!"

"Don't worry, Sunset!" Pinkie said, giving her friend a reassuring pat on the back. "Everyone makes mistakes their first time in the kitchen. I'll make some more in a jiffy!"

True to her word, Pinkie had the second cupcake frosted in a matter of seconds. The less adorned cupcake looked practically tiny compared to the first.

"Let's eat!" Pinkie said. "Sunset, since I kinda accidentally didn't let you help me at all except with the frosting, you get first pick!"

"I'll take this one." Sunset said, taking the normal cupcake. "Dig in, Pinkie."

"Oh, you bet I will!" Pinkie said, grabbing the laced cupcake with both hands and shoving it into her mouth, frosting and all. For once, Sunset was glad Pinkie Pie was so reality-bendingly weird.

"So, how does it taste?" Sunset asked, taking a bite out of her cupcake before being taken on a three-second, lemon-flavored trip to heaven and back. Pinkie's cupcakes were the best thing ever.

"Amazing!" Pinkie replied. "I feel so... Happy! And happy! Did I mention happy?"

"Yeah." Sunset said. "Do you feel good?"

"Yeah."

"Really good?"

"Yeeaaaaahhh..."

"Hey, Pinkie, would you stand on your hands for me?"

"Sure..." Pinkie said, supporting herself on her slender arms.

"Now could you sit on the counter and put your feet in the sink?"

"Of course..."

Soon, Pinkie's shoes were bobbing cheerfully beneath the faucet.

Sunset nodded to herself. This was good; the chemical was designed to put the subject into an extremely suggestive state for around twenty minutes. It also had some more... Aesthetically pleasing effects.

'Now,' Sunset thought to herself. 'The fun begins.'

"Now, Pinkie," Sunset said. "What comes out of this faucet?"

"Water, silly."

"No. The thing that comes out of this faucet is soda. Your favorite flavor of soda."

"Oh, okay."

Sunset turned the faucet on, and Pinkie's eyes widened.

"Triple-strawberry-cherry-orange-blue-razzle-dazzle-suicide-surprise!?" she cried. "I thought that was outlawed in seventeen countries!"

"Well, it's right here." Sunset said. "But you can't move your arms or legs."

Pinkie grunted with effort, trying to get at the liquid, but, just as Sunset said, her body remained stiff and immovable.

"Now, Pinkie." Sunset said calmly. "I'm going to give you a little bit of this soda. When I do, you're going to feel this wave of slow, happy relaxation flow through you, alright?"

Pinkie grunted in affirmation, and Sunset rolled her eyes.

"You can move your mouth."

"Okay."

Sunset filled a shot glass - why did she even have these? - and slowly poured it into her friend's waiting mouth. As she did, Pinkie seemed to melt, eyes rolling back as she groaned.

"So... good..." she moaned quietly.

"Do you want more?" Sunset asked. Pinkie nodded furiously.

"Okay, well I'll give it to you." Sunset said, filling the glass again. "But this time, you have to say something before I can give it to you."

"What?"

"I love doing what Sunset Shimmer says."

"I love doing what Sunset Shimmer says." Pinkie echoed. Sunset poured half the glass into her mouth, and she moaned again.

"Keep saying it." Sunset said, waving the glass.

"I love doing what Sunset Shimmer says."

The rest of the glass went down Pinkie's gullet.

"I love... Doing what Sunset Shimmer says."

"Doing what I say makes you feel good, doesn't it?" Sunset said. Pinkie moaned.

"I... I love doing... I love doing what Sunset Shimmer says." Pinkie said, as Sunset poured another half-glass into her mouth.

Suddenly, Pinkie's chest began rippling and heaving. Pinkie moaned in pleasure.

"That's what happens when you do what I say." Sunset said. "Doesn't it feel good?"

Pinkie moaned again, nodding.

"Now, every time I give you some of the drink, you'll feel a heat between your legs. Have you had any... intimate experience before?"

Pinkie blushed and nodded. Sunset poured a quarter-glass into her mouth, and Pinkie moaned.

"It's nothing to be ashamed of." Sunset said. "Was it with a guy, or a girl?"

Pinkie shook her head.

"Oh." Sunset said, grinning. "Was it... By yourself?"

Pinkie nodded.

"Once..." she moaned. "And... I felt so ashamed after..."

Sunset poured the rest of the glass down into Pinkie's mouth.

"From now on, when you drink this, you'll feel a burning need, a longing, to play with yourself. To masturbate. But it's all right; Masturbation is good. Repeat that."

"Masturbation is good."

A full glass this time.

"ooooOOOH... Masturbation is good."

Another full glass.

"Masturbation is good."

Another glass.

"Masturbation is good!"

Another, and another quickly following the first.

"Masturbation is good!"

Sunset stopped pouring. Pinkie was panting heavily, eyes fogged with pleasure. Her eager pussy was soaking wet, leaking fluid out from between her legs that dripped down one leg and puddled on the floor.

"Whenever you say what I tell you to," Sunset said. "You'll feel me pouring the soda into your mouth. It tastes twice as good. It makes you feel three times as relaxed and blissful. It makes you four times as aroused. And it makes you want to masturbate five times more. With every cup, feel the effects increasing. Now, repeat after me."

Pinkie's chest began to expand again, and Sunset smiled at the bulge in Pinkie's shirt.

"I love Sunset Shimmer."

"I love Sunset Shimmer!"

Pinkie moaned.

"Sunset Shimmer is the most beautiful person ever."

"Sunset Shimmer is the most beautiful person ever!"

Another moan. The puddle grew.

"I masturbate for Sunset Shimmer."

"I masturbate for Sunset Shimmer!"

Yet another moan, this one louder.

"I masturbate to Sunset Shimmer."

"I masturbate to Sunset Shimmer!"

Pinkie practically yelled, and Sunset thanked Celestia that she'd invited Pinkie over to her house out on the outskirts of town; it wouldn't do to have anyone overhear this.

"Sunset Shimmer is my Mistress."

"Sunset Shimmer is my Mistress!"

Sunset decided enough was enough, and turned to Pinkie, grabbing a large glass from a nearby cupboard, filling it, and pouring the entire thing into Pinkie's mouth.

A scream of pure lust filled the air as Pinkie drank the liquid. Her eyes rolled back into her head, and she moaned raggedly, panting hard. It was obvious she'd climaxed, but thanks to Sunset's triggers, her arousal was still going strong.

"Pinkie, you can move, but whenever you try to masturbate, your hands just stop." Sunset said. Pinkie practicaly threw herself to the floor, hands headed straight for her legs, but stopping just short. Pinkie moaned in frustration and arousal.

"Do you want to masturbate, Pinkie?" Sunset asked nonchalantly.

"YES!" Pinkie screamed.

"Yes what?"

"YES, MISTRESS!"

"I'd love to let you, but, see, I can't let Pinkie Pie masturbate."

Pinkie writhed on the floor, half-mad with lust, juices practically gushing from her.

"I can only let girls named 'Slut' masturbate." Sunset said. "What's your name, by the way? I forgot. silly me."

"M-M'name's Sl-Slut." Pinkie stammered.

"What?"

"My name is Slut!" Pinkie screamed.

"And what am I?"

"You are this Slut's Mistress!"

"Good Slut. Orgasm now."

Pinkie screamed with pleasure as her body twitched and quivered with the raw force of her release. However, once the wave of bliss died down, Pinkie found the fire of her arousal even stronger than it had been before.

"Good, good..." Sunset said. "When I snap my fingers, Slut, you can masturbate, and you'll orgasm with every stroke. It'll feelso good, so amazing; so relaxing. However, with every stroke, more of that soda will pour into your mouth and down your throat. With every stroke, Slut, you'll think of me, you'll think of your new name, and you'll think of how much you love your Mistress. In your mind, you'll repeat everything I've told you to say, and only when you truly understand your place will you be allowed to stop climaxing. Understand, Slut?"

"Y-Yes, Mistress!" Slut cried.

"Good. Make sure your strip and head up to my bedroom before you masturbate, Slut. I want to see this." Sunset said, pouring another large glass-full of water down Slut's throat before snapping her fingers.

Off flew Slut's pants and shirt, followed by bra and panties, and, before Sunset could even blink, Slut was gone.

Chuckling, Sunset followed the trail of pussy juice to her room, where Slut writhed with pleasure in the middle of the floor, both hands working in and out of her gushing hole like pistons. She screamed, eyes closed, and Sunset smiled..
Sunset watched this for several minutes, admiring her work as an artist might admire a particularly beautiful painting. Soon, though, Sunset decided she needed to end the fun; her twenty minutes were almost up.

"Who do you love?" Sunset asked casually.

"MISTRESS!" Slut screamed, before climaxing harder than she had ever climaxed before. Juices sprayed all over the room, and Sunset licked some cum from her finger. It tasted sweet, tangy, and vaguely of cherries.

She thought about going down there and tasting more, but she held back.
'There'll be time for that after I've taken the others.' she told herself.

"Again." Sunset said. "Who do you love?"

Slut's reply came as a wordless cry of pleasure that reached tones so high it actually became inaudible. Her eyes rolled back in her head for the third time that day, and she collapsed on the floor, twiching in pleasure.

"Good." Sunset said soothingly. "What is your name?"

"Sssssssslllllluuuuuuuutt..." Slut breathed.

"Good. Who do you love?"

Slut climaxed the hardest yet, and Sunset stepped forward, worried that she might have damaged her friend's brain somehow. However, Slut opened her eyes, and Sunset sighed in relief.

"Slut?" Sunset asked. Slut orgasmed then and there, and Sunset grinned. The conditioning was properly set.

"Good, good. You're a good Slut." Sunset said, as Slut orgasmed over and over just from the sound of her Mistress's voice. "Now, listen to me, Slut. Everything I say is the absolute truth. Feel my words soak into the core of your soul as you accept them as reality."

"You love Mistress." Sunset said. "You love serving Mistress. It is your only desire in life. If Mistress is pleased, you will feel pleasure beyind your imagination. Do you understand?"

"Y-Y-Y-Y-Yes!"

"Good." Sunset said. "Now, when I tell you too, you'll orgasm harder than ever and fall into a deep sleep. In this sleep, you will get up, clean yourself up, and put your clothes back on. When you put the last article of clothing on, you will wake up, and everything you learned here today; everything about Mistress, and what you love, will be locked away, in a safe inside your head. You'll be Pinkie Pie again. But when I - and only I - ask you who you love, you will orgasm harder than you ever have before, and the safe will open, and Pinkie Pie and Slut will trade places. Pinkie will be locked away, and all you will know is serving and pleasing me. Do you understand?"

"Yyyyyeeeeesss..."

"Good. Now I have some instructions for Pinkie Pie." Sunset said. "Pinkie, when you think about what we did here today, you will remember that we ate our cupcakes and had a nice chat about nothing in particular. We didn't make any plans, and you were about to leave. However, you will remember that masturbation is good, and whenever you climax as Pinkie Pie you'll think of me, you'll think of how much you love masturbating, and you'll think of how hot you never realized your friends - especially me - are until now. Do you understand?"

"Yes..."

Sunset stepped back, nodded, and watched as her chemicals ran their course, finishing their job of expanding Pinkie's bouncy, perky breasts. It wasn't anything big - until Sunset had taken the rest of her friends, she wanted to keep things subtle - but it was big enough that all of Pinkie's bras would be a pretty tight fit now.

"Pinkie?" Sunset said, the thought sparking an idea.

"Yes, Mistress?"

"You don't like wearing bras any more." Sunset said.

"I don't like wearing bras any more."

"Pinkie?" Sunset said again.

"Yes, Mistress?"

"Orgasm."

Author's Note

Woo! First clopfic! Here we go! Hope y'all enjoy it.
Who should I do next? I'd like to keep it within the M6 for now, but after that, background ponies are fair game.