Twilight read on, blushing furiously. Her wings stood stiff from the excitement, her throat felt dry, and there was a dampness building in her nethers that begged for release. “Oh my, can you really do that with your tongue? Either this author’s really well-read on shapeshifting spells, or he doesn’t know what he’s doing and just doesn’t care about anatomy.”

A voice came from behind her, atop the balcony of the library. “Twilight?”

“Yaah!” She jumped up and made her horn flare up, causing the book she’d been reading to disappear in a puff of smoke. An astute observer would have noticed the book was titled ‘Thirteen Erotic Tales of Fourteen Raised Tails’. If said observer was also an avid reader who’d stumbled into fetish territory once or twice, this observer would have known the book as being a collection of short stories mostly centered around kidnapping and brainwashing in various different iterations.

Rainbow Dash was neither an astute observer nor an avid reader of fetish material. She did, however, notice the book disappearing. “Whoa, calm down, Twilight. What were you reading, horror stories?”

Twilight smiled sheepishly and nodded. “Yes, I was reading something very disturbing, so disturbing I don’t want Spike to find it.”

Rainbow Dash landed in front of her. “Oh, right. Where is Spike?”

Twilight cocked her head towards the back window. “Helping out the Cutie Mark Crusaders. Apparently they needed someone with opposable thumbs today.” She shrugged.

Rainbow Dash looked at the floor bashfully. “Right, guess they would need that sometimes.”

Silence fell between the two. Twilight bit her lip. “Soo… how was last night?”

Rainbow Dash nearly erupted, taking off with excitement. “It was great! You wouldn’t believe how good it felt to finally stroke myself like that, I don’t even know why I never tried that before. It was like a thousand lights going off on my skin!”

Twilight suppressed a smile. “So you liked it? And you… you know…”

Rainbow Dash sighed, settling down on the ground again. “No, I couldn’t. It wouldn’t work, at least I don’t think it did. I know how it’s supposed to feel, and I still didn’t feel it. But now I really want to, and I think you might be able to do it.”

Twilight flinched. “I beg your pardon?”

Rainbow Dash smiled ecstatically. “If you put me under again, like really deep, and you told me to come, then I’d come, right?”

Twilight’s erect wings twitched, eliciting a wince from her. “Umm, maybe. You’re absolutely sure you don’t get aroused by normal means? You tried fantasising about just making love?”

Rainbow Dash nodded. “Yeah, I tried that and it didn’t cut it.”

Twilight felt a lump form in her throat. She tried to ignore it, but it only went deeper down into her chest. “That’s okay, I was kind of expecting that. The first try was just a test run, really. We can do a little more digging today.”

Rainbow Dash flew up to her, her face inches away from the alicorn’s. “Oh, thanks so much, Twilight, I really appreciate it. I was thinking maybe you could make me fantasise about putting on socks that made me feel sexy, or having to wear a collar, or maybe even forcing me to exercise, that’d be pretty hot and make me stronger. Ooh, or maybe you could have something lick my pussy.”

Twilight recoiled and nearly gagged. “Rainbow! Do not call it that.”

Rainbow frowned, her wings nearly missed a beat in the excitement. “Why not? Isn’t that what it’s called?”

Twilight held her head high, trying to look as regal as a bookworm could. “No! Civilised ponies call it a vagina, or an opening, or a marehood. We do not call it a pussy; it’s offensive.”

Rainbow Dash squinted, confused. “Offensive? To who?”

“To the Love Cat Kingdom’s residents, and any other races of talking cats I’m not aware of. I’m sure there must be somewhere.” Twilight raised a hoof to her chin, pondering.

“What about honeypot?” Rainbow grinned.

Twilight rolled her eyes. “That’s even more offensive, Rainbow Dash.”

Rainbow’s ears perked. “To who? The bees outside your window?”

“To the Honeypot family, who are very close friends with my family, by the way. Canterlot nobility does not like it when you disrespect their family name. Besides, if you really taste like honey, you should see a doctor.” Twilight grimaced at the thought.

Rainbow Dash let off a resigned grunt. “Fine, I’ll call it a vagina, or a marehood. Just anything to rub against my lips, okay?”

Twilight’s serious expression did not let off one bit. “You mean your labia. Those are called labia.”

Rainbow Dash’s ears drooped, along with her wings, sending her back to the ground with a groan. “Yes, I mean my labia, I can still see that diagram you made me memorise. Now could we please just get to the good stuff already?”

Twilight suppressed the urge to let off a groan of her own. “So you’re sure you want to go further? You really want me to bring out that submissive side to make you come?”

Rainbow Dash shrugged. “It’s just to fantasise about stallions. Not like it makes a difference or means anything, right? It’s just a game.”

Twilight’s mood lightened at that. “Exactly. It’s just a game, and you should get to enjoy yourself.”

Rainbow Dash flew up again and dropped herself on a pile of pillows, ignoring the papers she scattered with her landing. “So, can we get started?”

Twilight nodded and picked up the mess of papers with her magic. “Sure.” She sat down behind Rainbow Dash’s head.

Rainbow Dash’s nose curled when Twilight approached. What’s that smell? Is that Twilight’s perfume? Smells nice, kinda like lav-

“Dive down deep, pet.”

The wave of relaxation washed over her, making her muscles go limp and heavy. Rainbow Dash kept her eyes open, though.

Twilight smiled down at her friend. “Comfy, Rainbow Dash?”

Rainbow Dash nodded and stared blankly ahead. “Y-yeah. That trigger really works.”

The alicorn smiled and got into character again, letting the edge bleed out of her voice so it became a gentle monotone. “Of course it does. You want it to work, so it does. You can relax for me, and you can trust me. We’re going to play a little game, Rainbow Dash.”

Rainbow’s ears perked when she heard Twilight address her by name.

Twilight made a mental note of it, but didn’t let anything show. “What we’re going to do is play pretend. I want you to get into a part, like you did for the play for Hearth’s Warming Eve. You remember how well that went, don’t you?”

Rainbow closed her eyes to visualise the scene. “Yeah. That was fun.”

Twilight afforded herself a small grin. “It was, wasn’t it? Just getting into character, becoming somepony you weren’t. It’s natural to want to be something else, right? It’s fun, and it makes you feel free. And sometimes you get into a part so deeply you might even forget who really are for a moment. Think about that for a moment, Rainbow Dash, and breathe in deeply for me. I want you to feel that good memory and focus on it as you relax.”

Rainbow Dash took in a big gulp of air as that memory came back to her. Playing Commander Hurricane had been so fun, she’d really gotten into it. The memory, as well as the attention to her breath, made her feel relaxed and happy.

Huh. I really am breathing deeper now. Can’t remember when I last felt this goo-

“Dive down deep, pet.”

Again, Rainbow Dash could feel herself diving down an imaginary platform and into a deep well of relaxation, cutting off her train of thought. Funny, didn’t notice that the first couple of times.

Twilight smiled at the immediate response. “Now I’m going to describe a role for you to play. You are going to play a pony pet, and you’re going to feel great pleasure in doing so.”

Rainbow’s jaw went slightly slack, the words trickling into her mind like sweet syrup again.

Twilight kept her voice steady and even, just as before. “It’s an easy thing to play, a sexy pony pet. You can already see yourself just strutting alongside a strong, powerful Mis-” She stopped herself. “-Master who takes care of you. Picture yourself being groomed, if you can, feel a soft brush go over your mane.”

Rainbow breathed slowly, a tiny smile still on her lips.

“And as you know, a sexy pony pet is rewarded with sexual pleasure. Every time you feel your Master brush your mane, every time you sit still like a good sexual pet should, you’ll feel a tingle in your nether regions.”

Rainbow’s smile grew.

Twilight had to suppress a gulp at the sight of her friend like that. “Feel it happening, just feel yourself playing along. A good pet obeys, a good pet is rewarded with pleasure. In fact, just being called ‘pet’ is making you wet and eager and hot, isn’t it? Just say ‘Yes, Your Highness’.” Twilight held up a hoof in front of her mouth, embarrassed.

Rainbow Dash didn’t break trance. She didn’t so much as twitch at the suggestion. “Yes, Your Highness.”

“Good pet.” Even as Twilight said it, she could smell the arousal sweat coming off Rainbow Dash’s body. She took a deep breath to steady herself. Okay, time to get to the serious business. Just do it like the books said and try not to get too scientific. And remember you’re dealing with a straight mare, for crying out loud, not a fictional gay character! “It’s easy to picture yourself as a good pet, isn’t it? Just following and obeying your Master, nothing to care about but obedience, just letting go of everything and enjoying the pleasure.”

Rainbow Dash moaned.

Twilight took that as a good sign. “See it in your mind’s eye, pet. See yourself submitting to a strong, powerful, but caring Master, following His orders and feeling that wonderful reward. Feel your mane being brushed, your tail and wings being groomed, your hooves being tended to. With every breath you take, you’re becoming prettier and prettier, and feeling hotter and hotter. Every single breath makes obedience feel better, until it becomes natural to obey, and enjoy your mindless devotion.”

A tiny grimace crept in Rainbow’s expression at the mention of her hooves, but it didn’t snap her out of it, still.

She’s still sensitive there, even in trance. “You can feel yourself getting into that role more and more, can’t you? Just playing along and feeling it become easier and easier to play. Just say ‘Yes, Your Highness’.”

Rainbow Dash sighed blissfully. “Yes, Your Highness.”

“Very good, pet.” Right on cue, Twilight could almost feel the wave of pheromones being ejected by her friend’s body. Then again, I suppose the technical term should be ‘allelochemicals’, since that’s what they’re called in between different species. But on the other hoof, pegasus ponies can breed with unicorns, so it’s still pheromones. Except I’m not a unicorn, I’m an alicorn now. So are those pheromones I’m smelling or allelochemicals? She shook her head. Dumb magic messing up my taxonomy. Now, where was I? “The more you obey, the more you grow aroused. The more you grow aroused, the more you want to obey. It’s easy to let go and obey, so it’s easy to grow aroused. I want you to imagine your Master is standing beside you, Rainbow Dash. Pretend He wants to reward you, like the good pet you are. Can you picture that for me?”

Rainbow Dash’s body shivered. “Yesss, Your Highness.”

Twilight swallowed and steeled herself. “Good pet. Now feel your nether lips growing warm and moist, and a slight tingling starting in your clitoris. Your body remains still, your legs cannot move to stroke yourself. All you can do is submit to the pleasure of obedience. It's all you feel, all you want, all you can think of. Can you feel it, pet? Can you feel the pleasure blocking out everything else?”

Rainbow Dash clenched her eyes shut. She nodded curtly and her breath sped up.

Twilight afforded herself a smile as the suggestions sank in. “It’s such a wonderful feeling to submit, isn’t it, pet? Your sex set alight like that, all your cares being pushed aside. Nothing matters but the pleasure, and your body wants to submit. You can be a good pet and come if your Master tells you to, can’t you?”

Rainbow Dash grimaced. Even from her vantage point, Twilight could see Rainbow’s marehood twitching and leaking in anticipation.

“Be a good pet for your Master, Rainbow Dash. Feel yourself losing control, getting closer and closer to a climax. Feel how long you've been pent up, just waiting for Him to give you release.”

Rainbow’s breath came in ragged now. Her face was contorted in agony. “Y-yes, Your Highness… so close…”

Twilight mentally braced herself. “Hear your master’s voice talking for me. Hear Him give you permission, hear Him give you the command.”

Rainbow tensed up all over, her wings spread out and hard.

“Come, pet.”

Rainbow Dash’s eyes shot open along with her mouth, though whatever sound she wanted to make got stuck halfway up her throat. Her wings stiffened and contorted, her back arched, her hips bucked. She could feel the tension leaving her in rough bursts, with wave after mind-numbing wave of pleasure wracking through her.

She bucked once, twice, thrice, she lost count and her body just wouldn’t stop until, after what felt like an eternity, it did.

Settling back down on the pillow, Rainbow Dash slipped back into the trance she’d been in. Every little hair of her fur was standing on end, the air was thick with the smell of her arousal, and she only vaguely registered that her arousal smelled strong and awesome, not that she’d ever doubted it would. Her wings settled back down, tiny threads of muscle and sinew pulsed pleasantly and her feathers brushed idly against the softness of the pillows. She took deep breaths through her nose, welcoming the smell of books and wood, the scent of an egghead’s home. It felt comforting, somehow, not at all like the fresh air of her cloud home, which had always had more of a sterile feel to it.

Everything throbbed in blissful afterglow. She tried to raise a hoof to her chest to feel her heart, but it wouldn’t budge. She tried to move her head, and the motion made her aware of the same throbbing in the tip of her ear. If she concentrated, she could follow the very vein that was making such a ruckus.

Rainbow Dash panted and closed her eyes.

Well, that was… pretty good. No wonder so many ponies like it. I've really been missin' out.

Master? Twilight? Am I saying this out loud? No? I think I need to… close my eyes and… rest...

Twilight gave Rainbow Dash a few gentle taps on her face. “Rainbow Dash? Rainbow Dash, are you okay? You really went out of it there.”

Rainbow Dash blinked in confusion. “Dashie wanna play?”

Twilight raised an eyebrow. “I’m sorry, what was that?”

Rainbow Dash shook her head. “‘Dashie wanna play’, that’s the trigger you put in to make me feel that again, right? That’s what’ll make me submit, make me come. I can see the scroll in that control room thingie you made me picture. So why isn’t it working now? Why aren’t I coming again, or feeling horny?”

“Rainbow Dash, you just had your first orgasm ever, while in trance. You clenched muscles you might not have been aware existed before today, you arched your back like you were possessed, and I’m pretty sure you’d have screamed if you hadn’t been so deep under. Can you even feel your marehood now?” Twilight frowned. She went too deep, she must feel so embarrassed. She came so hard she’s stiff all over, and she’ll never trust me with something so intimate again.

I just ended our friendship. She’ll never want to even talk to me after this.

Rainbow Dash reached down with a stray hoof and winced. “Ah-ow, okay, that-that’s a lot more tender than I remember.” She slowly rolled over to sit up. “Wow. I feel great. A little tired and… whoo, I don’t think I’ll be able to walk straight for a bit, but hey, that’s what I’ve got wings for.” She flew up and stretched out her arms and legs, before wriggling her neck around to get the blood flowing normally again.

Twilight rolled her eyes. Then again, she is Rainbow Dash.

Rainbow settled down on the library floor and did some cat stretches. “Thanks a million, Twilight, I really owe you one.”

Twilight smiled. “Well, now that you mention it, I have been thinking of researching pu--”

“Oh, next time, you could make me come by rubbing my hooves, like they did in the Daring Do story. Or you could make me come by making me picture a Master who only licks me. Oh, could we maybe do some kind of story? That fantasy was kinda bland.” Rainbow Dash frowned, though still clearly on an emotional high.

Twilight swallowed her initial response and smiled. “No problem. You just make sure you keep up your practice, and don’t let this distract you from your job, or get any weird stuff in your head.”

Rainbow Dash waved her hoof, flying up above the alicorn again. “I’ve got nothing to worry about, Twilight. I’ve got you to look out for me, don’t I? Anyway, I’m gonna do some loopings over Ponyville to loosen my hind legs up.” She sniffed the hoof she’d used to check herself. “And maybe shower first.”

Twilight smiled. “You do that. I’ll see what I can do for our next meeting.”

“Thanks a lot, Twilight. See you around!” With that, Rainbow dashed out towards the balcony, multihued trail following her.

Twilight grunted and picked up the pillows Rainbow had rested on, careful to hold them in a magical field that blocked their scent. That Rainbow… if I didn’t know any better, I’d say she just wants me to get her off. I’m not a whore, am I? Well, technically she’s not paying me for it, so I wouldn’t even be that. What do ponies call someone who gives sexual relief on command, but doesn’t receive payment for it?

A slut. That’s the only word for it. Rainbow Dash thinks I’m a slut.

She shook her head and forced those thoughts away. No, of course not. She just wants help with intimacy issues, and she’s letting me practise hypnosis so I learn to use my voice, learn what trance looks and feels like and get control over that blasted impulse to control everything. Besides, I’m not trying to control her that hard, am I? I didn’t press the issue on the purple magic, not like it would matter. I could just keep reading about it and formulate my theories, let some other researcher work out the specifics. But then, Rainbow Dash is the best subject anypony could find for this. And I'm the only pony who's really researched the magic of friendship. The magic of arousal is the next next logical step, and that's easier to measure, at least. It would be nice to have something useful to show for all my work.

Maybe I should stop. Suppose I go too far, what if all this power goes to my head?

Twilight spotted Spike entering as she went down the stairs, mentally thanking herself she’d scent-proofed her pillows. “Hey, Spike. How did the crusading go?”

Spike nervously rubbed his right arm. “You know how you said opposable thumbs were a blessing?”

Twilight raised her eyebrow. “Yeah?”

“They’re not all they’re cracked up to be.” Spike grimaced and tried to make a fist with the claw he was nursing.

Twilight nearly dropped the pillows right there. She stopped halfway the thought, though. “Spike, what happened?”

“I tried to carry some heavy stuff, and I felt something pull in my right claw. I can’t make a fist, and I can’t stretch it out. It’s stuck like this.” He blushed.

She walked over to him and carefully inspected that hand, still keeping the pillows up. “Looks like you got a nasty cramp there. Didn’t Applejack take you to the doctor?”

Again, he grimaced. "I didn't tell her. I didn’t wanna make a fool of myself in front of the girls, especially when Rarity showed up.”

Twilight chuckled and rolled her eyes. “Okay, big guy, you just take a seat over there and I’ll get the salve. I just need to throw these pillows into the laundry machine first.”

Spike plopped down at the table in the central reading room. “Still setting up for your experiments?”

Twilight bit her lip. Well, if Rainbow Dash had bothered to listen, maybe. But that’s not her fault, she was just really excited. She’ll hear me out next time. “Yeah, just tidying up the basement, setting up some charged crystals. I should be able to do some serious work soon.”

Twilight trotted out back and threw the pillows with Rainbow’s musk on it in the laundry machine. She sighed. Well, I still feel like myself, at least, so the initial exercises aren’t too bad. Spike’s hurt, and I still feel I have to take care of him. Rainbow Dash was a little too excited, sure, but that doesn’t mean she won’t help or listen. She still respects me enough to hear me out.

She stuffed the pillows in and hit the button to start them washing. She chuckled.

Besides, even if she doesn’t, she wouldn’t have much choice if I insisted.

She shook her head and fetched the salve from her bathroom.

I really need to stop reading those novels. A straight girl like me has no business getting so riled up over another mare.

Author's Notes:

This is one of those weirder chapters. I need to set up what happens next, but not make it too obvious, and I need to keep everyone in character where I can. So the dark stuff is coming, and this chapter sets up some of it, but next chapter will properly prepare for the actual event. I did learn my lesson from last time, guys.

Rainbow Dash's experience of orgasm was originally not in the chapter, but I decided to add it because it's a big breakthrough for the character and it should get the attention it deserves. The Love Cat Kingdom is a reference to the comic books, they're not show canon. Seemed like a funny idea to have these two discuss what the proper term for things is. I mean: come on, it's Twilight 'Gesundheit' Sparkle, of course she's going to object to the more vulgar terms.

That said, I'm really, really worried about the next two chapters. I keep going back and editing them, but I still need to write new chapters as well as make sure the published ones are up to snuff.

I'm still not entirely sure if the purple magic (aka sex magic) is worth adding, though, but that's probably because I haven't advanced in future chapters enough. The one I finished writing at the time of publishing is one involving Scootaloo, and after that it's probably going to be a three-parter chapter involving a simple two-word combination that, right now, only shows up once in a Google Search and doesn't show up at all for custom searches on this site.

So yeah, that three-parter chapter will either put this fic on the map or shove it right off. No pressure at all.

Another note on this chapter: Denial is not just a river zebras drink out of, Twilight.