Starlight’s Sinful Secret

by Poniez n Stuff

Rating: mature
Tags: Starlight Glimmer, Romance, Original Character, Porn, Sex, Fetish, Suicide / Self Harm, Cozy Glow, Profanity, Non-consensual, Violence, My Little Pony: Friendship is Magic, Dark
Length: 4784

Starlight Glimmer has always been a foalphile, but she’s done a pretty good job at keeping this a secret. Now, with the Map calling her and Cozy Glow on a trip together, will she be able to prevent her urges?

Starlight Glimmer has been called by the Cutie Map for a very important assignment: Rekindling her relationship with her abusive mom! However, Starlight’s been keeping a secret from her for far too long… a secret that could ruin their already rocky relationship forever. Luckily, the Map accounted for that and had her bring along a special friend who’s sure to let that side of her come out for her mom to see. A little filly named Cozy Glow.

Will Starlight be able to keep her sinful urges under control long enough to survive the train ride over? What will her mom say upon seeing her with a little filly? And how will the two of them survive sharing a bedroom?!

There’s naughty fun at the center of this friendship mission!

Cover art source.

Content warning: Foalcon, rape, incest, abuse, mental torment and extreme violence.

(This fanfic is a work of fiction. I strongly condemn any real world connections to this story. It is not at all made to condone any of these topics.)

Published 2024-10-11 23:20:00 UTC
Last updated 2024-10-11 23:20:00 UTC

The Cutie MAP

It was a day like any other in Princess Twilight Sparkle’s School of Friendship. Ponies and other creatures eagerly made their way inside to make new friends, learn important friendship lessons, and maybe even learn a thing or two about magic along the way. Everypony eagerly made their way to their classrooms as the faculty got ready for another exciting day. Yes, it was truly a magical and harmonious place for everypony… well, just about everypony.

Starlight Glimmer, the school’s sole guidance counselor, was late. Again. Even though she lived in the Castle of Friendship with Princess Twilight, a short trot away from the school, Starlight could never seem to make it on time. Twilight was always ready to be there bright and early, but she could never convince Starlight to join her in the wee hours of the day. “It’s enough,” thought Starlight, “that I show up for this job at all!” Of course, she would never express her dissatisfaction to Headmare Twilight in such a direct manner. Instead, she settled this schedule disagreement the only way she knew how: by sleeping. She usually wouldn’t even set her alarm, or claim that it mysteriously never went off. Despite Twilight knocking on her door and yelling at her to get ready everyday, Starlight always managed to still be “sleeping.” At least that’s what Twilight thought. She might not be the world’s greatest actress, but anypony can keep their eyes closed and pretend to snore, right? “What Twilight doesn’t know won’t hurt her,” Starlight thought.

“Besides, it’s too late to come out about this fib now.” Starlight was never too late for the start of the day. She noticed that nopony ever comes to see her in the first hour of the day anyway, so she would usually sneak in late and do seven hours of her eight hour shift. Truth be told, Starlight thought that the opening faculty meetings were an unnecessary waste of time anyway. What’s the big deal if she misses them? But it wasn’t mere boredom that made her skip out. In reality, Starlight was never too thrilled to be doing this job in the first place. She figured that the more she spends time there, talking with her co-workers, the more clear her dissatisfaction would become. And she couldn’t have that. The more that became clear, the more other secrets might come out. Dark secrets. Secrets that her friends would never forgive her for.

The truth was bad enough as is, but she always knew that the worst part was that she never confessed it to Twilight Sparkle or her friends. That would’ve been the bare minimum to say the least. Sure, they knew she had her dark past, but that was nothing compared to this! The Mane Six were pretty forgiving of her for somepony who brainwashed a whole town, ripped away ponies’ cutie marks, and even caused multiple apocalyptic alternate histories with her time travel mishaps. That was all pretty bad and Twilight was still gracious enough to take her under her wing! She knew she hadn’t truly earned it, though she could never confess the full extent of why. Deep inside, she knew that telling the truth about her own evil would be the first step towards fixing it. She always knew that starting a new life based on a lie about who she really was would come back to bite her. How could she get help if she can’t even be honest?

As she passed down the halls, she overheard Applejack teaching her class. “So ya see youngins, just because somepony doesn’t actively lie, doesn’t mean that they’re not being dishonest. Sometimes, keeping an important truth from your friend can be just as bad as tellin’ a lie!” Starlight couldn’t help but overhear this painful lesson.

“Sweet Celestia! Who’s she talking about?!” Starlight wondered. “Is she talking about me?! Somepony else?! Somepony else, right?! Right?! Not me! Not me!!!” She started sweating buckets and fell into a fetal position. Just then, the bell rang. Everypony was quickly running out of their classrooms. Starlight panicked, “Oh, what do I do?! They’re all onto me!!!” Starlight looked around. Everypony was just walking to their next class carefree. Nopony had been looking at her—but now they all were. She seemed out of her mind, looking all around and sweating like crazy.

She stood back up and fixed her hair. “Heh heh…” she forced a completely unconvincing grin, “I just remembered, I left the oven on back at the castle. Uh… yeah, I was making a… surprise casserole. Yeah, it’s a castle-role.” Everypony just stared. “Heh… get it? A… castle…” She cringed a little and cleared her throat. “But uh, it’s probably burnt and I have to leave to make sure I didn’t set the castle on fire… with my castle-role. Um… yo–you get it, though?” Silence. “Okay, be right back.” She disappeared with her magical teleportation spell. She popped back. “Oh, great! Nothing to worry about! … Casserole’s ruined, but the castle is fine… So, how’s everypony else doing?!” The students all continued to stare, totally bewildered. She teleported again and popped into her office.

“Ugh!” she cringed. “That wasn’t even the most embarrassing moment I’ve had… this week!”

She sat back up behind her desk. As long as nopony mentions that awkward incident to her friends, she should be fine. In reality, though, her strange behavior had been getting worse and worse. She put her head down and wondered how she found herself in this position. If only Twilight hadn’t have forgiven her. She’d be much better off as a stone statue, in Tartarus, banished to another dimension, or even dead. No punishment could be as bad as the guilt of this undeserved forgiveness. Especially not when she’s now managed to find herself in the worst possible job, given the dark truth about herself that only she knew.

For as long as Starlight could remember, she always had an unhealthy interest in younger ponies. At first it started out semi-innocent. She would develop close connections with fillies and colts as the only friends she felt she could relate to. Maybe it went back to when Sunburst left her. She told herself this, as if that made it any less creepy. As soon as the the young colt got his cutie mark when the two of them were just foals, he moved away and never saw her again—until after that whole “totally evil/caused multiple apocalypses” thing. She thought about him nearly every single day growing up in her hometown. Even as the leader of her own town, she could never quite get over him. Her obsession over him motivated pretty much everything she did. That’d be creepy enough on its own, but it was made worse by the fact that she was growing up and her memory of him wasn’t.

This certainly didn’t help matters, but deep down, she remembered that there must’ve been another cause for what quickly developed into a sick perversion. There seemed to be some long forgotten memory that may’ve played a role in this disgusting obsession of hers. She couldn’t quite remember what it was, but she felt like it connected to her very early childhood. She didn’t have many memories of when her parents were still together. When they got divorced, her mom left her, and neither her nor her dad had heard from her since. The memories of those days were so foggy, she couldn’t recall what might’ve happened. Maybe it was nothing. Just a false memory she allowed herself to imagine up to prevent any responsibility. She was never quite sure.

She’d moved past those days a long time ago, she would always tell herself. “Twilight gave me a fresh start. She saved me from my past. I’m not the same pony I once was. I’ve changed!” Of course, she had changed. It’d been years since she touched a filly or colt inappropriately. Even her clopping started to dwindle, and when she did it, she even managed to have one or two fantasies about adult ponies for a change. She was getting herself slowly under control. Sure, she never sought mental help for her sick perversion, but that’s a scam anyway, isn’t it? (The irony of her current job was never lost on her.)

But those poor foals from her village, she would always think back. “I may have threatened them, paid off their parents, and/or used a magical silencing spell to shut them up about what happened,” she thought, “but that doesn’t make what I did go away. My attempts at erasing their memories were thwarted when Twilight undid the rest of their brainwashing. They’ll now need to live with what I did to them for the rest of their lives. I may be slightly better off now, but I can’t change the past… Or actually, I can, but that didn’t work out so well last time. If I tried to go back and erase my abuse, they’d probably just end up dying at the hooves of some ultra evil supervillain!” She let out a groan.

There was a knock at her office door. “Come in,” she said reluctantly. A young pegasus filly opened the door. She was a pink pony with beautiful curls in her bright blue mane and the cutest little freckled dimples. Her name was Cozy Glow and she was everything Starlight Glimmer ever wanted.

That was what was so bad about this job. After her initial redemption, Starlight thought she could rehabilitate herself without anypony needing to learn the truth, if she just kept herself away from the foals. This plan worked well for a little while. Sure, she had a close call with Toola Roola and Coconut Cream, but she managed to control herself, as difficult as it was. But now, as a guidance counselor, constantly helping numerous kids every single day?! If Twilight had known anything about who Starlight was inside, she never would’ve considered her for the job. But once she got the offer, what was she supposed to say? “No thanks, I like children a little too much”? There was no way out of this constant temptation!

And now, she’d been staring at this young foal for who knows how long. Starlight cleared her throat and gave a big, awkward smile. “So, Cozy Glow, what brings you here?” she asked.

Cozy sat her plump, forbidden filly flank on the chair in front of the desk. Starlight tried not to stare, grinning ear-to-ear, imagining sniffing that thing later.

“Well, you see,” Cozy said in the most adorable, sweet voice you could ever imagine, “I’m still having so much twouble making fwiends. It’s just so hard to know if you can trust somepony. You never know who could be some kind of monster hiding a deep dark secret,” she said.

“I’M NOT HIDING ANYTHING!!!!” Starlight yelled franticly.

They stared at each other.

“Um… I mean… heh. Just, uh—just ignore that.” She began to sweat. “So, um… feel you can’t trust anypony, huh? That’s totally understandable, Cozy. But you don’t have to worry. The students here are really nice. I mean, what do you think? That Twilight let an evil villain get enrolled in our school or something?! Crazy! Almost as crazy as her hiring some horrible creep to work here!!!” She gave an unconvincing smile, rested her head down awkwardly into her hoof and leaned on the desk. “Heh, heh. That’d be crazy!” Her voice cracked.

They both looked at each other awkwardly.

“Well, I guess you’re right,” Cozy Glow said. “I’m not sure what I was so worried about. That was pretty silly of me! Do you think other ponies would be as suspicious of me as I was of them?” she asked innocently.

“I hope not!” Starlight blurted out. “Um… for your sake, I mean. Not worried of what they’d think of me or anything like that! Ha ha ha!” Her face turned completely red.

“Thanks for the advice, Ms. Starlight!” Cozy Glow said, and gave her a big hug.

Feeling Cozy’s front legs around her sent shivers of anticipation up Starlight’s back. Her eyes twitched. “No– No problem at all!” she told her.

Cozy Glow flew out of the room and waved back at Starlight before closing the door, giving her the privacy she desperately needed. Starlight exhaled, relieved. She got up and kneeled down to Cozy’s chair. She put her face directly on the seat and gave it a gigantic sniff. “Oh, fuck yes!!!”

Cozy opened the door back up and looked in. “Did you say something, Ms. Starlight?” she asked.

Starlight looked up at her, her body still clearly leaning over to the chair. A single hair from Cozy’s tail was plainly visible inside Starlight’s nostril. “Um… no,” she said.

“Oh, sowwy. I must be hearing things!” Cozy said in a naïve voice and closed the door back up.

Starlight wiped her forehead and let out a sigh of relief, before putting her head back into the seat and sniffing for several more minutes.

An hour later, Starlight was lying down, ashamedly, on her couch. Fluids dripped from her pussy. She’d just gotten done pleasuring herself and having the most intense, shameful orgasm she’d had in a really long time. She just lucked out that nopony else came to visit her during that. She didn’t even bother locking the door. A dark, hidden part of her that she’d been trying to repress secretly hoped one of the young foals would walk in on her.

Her hair was a mess and she was breathing heavily. “Oh, sweet Celestia, what’s wrong with me?!” she asked herself. “That’s it! I need to leave this job! I can’t keep pretending to be a trustworthy mare!” At that very moment, she felt something strange on her flank. She wondered what it was for a moment, until realizing that she’d felt this before. She looked down in horror. Her cutie mark was glowing magically. She’d been summoned by the Cutie Map. “Oh, you’ve got to be kidding me!” she groaned.

“But maybe this is for the best after all,” she thought. “If I’m on a friendship mission, I won’t have to spend anymore time around these foals that put these horrible thoughts into my head!” She ran out of the room, excitedly. On her way down the hall, she bumped into Twilight.

“Where are you going, Starlight?” the Princess asked her.

“No time to talk, Twilight! The map awaits!” Starlight gloated and showed off her flank.

“Ooooh, that’s so exciting!” Twilight said. “And to think, during school hours! It’s the perfect opportunity to give the students an up close look at how the map works!” The students came out of their classrooms and looked at her with excitement.

Starlight stared at her in shock. She looked around at all the cute, smiling students. “Sigh. Okay, let’s just get this over with,” she said. She put her head down and slowly dragged her hooves back to the castle. Twilight was confused by this sudden shift in attitude. She looked back at the students who seemed just as bewildered. Twilight gave a nonchalant shrug before leading them all to the castle with her.

“Okay,” Starlight thought to herself, “a whole bunch of sexy little fillies and colts may be about to join me, huddled inside of a tight room, giving me hardly any space to move around without running into their… cute little rumps… which will probably get really sweaty from the heat of us all being cramped together in such a small space… Uh, but it’s okay! I have the perfect excuse to get out of there as quickly as possible! ‘No time to stay and talk, students, there’s a friendship emergency that I’m urgently needed for!’ Then I just go to wherever it’s calling, take as much time as I need, and while I’m there—figure out some reason to keep me away from the school permanently!” She put her head back up and hurried to the map. “I wonder who I’ll be going with anyway. Ooh, I hope it’s Trixie!”

With a leap in her step, she galloped to the map room, threw open the door and looked at it with a big smile on her face. There it was, her cutie mark magically floating up to the location she’s needed in. “Thank Celestia! I’m free! Now, where am I going, anyway?” She looked. The place seemed somewhat familiar but she couldn’t quite place it.

Twilight came in the door following her. “Starlight, why didn’t you wait for us?! I was going to show off your flank to all the students first.” Starlight’s eyes popped open; she blushed and looked at Twilight. “Of course they’d be interested to see that glowing cutie mark of yours,” Twilight added. “It’s not often they get to witness an official friendship mission in person!”

“Oh…” Starlight said. “Uh, sorry, Twilight.” She tried to hide her excitement at the idea of all those young fillies checking out her ass. “Guess I was just excited. That’s all!” She gave a phony, toothy grin. “Anyway, Twilight, does that place look familiar to you?”

The rest of the students began piling into the room. They pushed and shoved each other aside, shaking their immaculate, tiny little rumps on the way over. Starlight’s excitement was almost too much to bear. As they came in, they all glanced at her flank in amazement. The glowing cutie mark was so stunning, none of them could help rubbing it with impressed “oohs” and “aahs.” Starlight twitched nervously as her pussy tightened up with glee at the thought of these innocent little foals admiring her plot so much. She wouldn’t even be able to admit it to herself, but she secretly tried moving her hips around so that one of them might accidentally stick their hooves in her pussy, or at least graze it. Before any of them could, her conscience came back and she quickly sat on the floor to divert the students away from her butt. A few still rubbed it as they passed by, much to her regretful joy. She glanced down nervously, wondering if they’d notice that she was making the floor wet with her steaming hot horse pussy juices.

“Okay, everypony, settle down,” Twilight instructed. “Now, I think everypony’s here, so if you’ll please listen up. Yes, Starlight does indeed have a glowing mark on her rear end, but you can all give it a good rub before you leave if you’ll all just be quiet.” Starlight squirmed with a horrifying mix of eager anticipation and anxious dread. “Before that, though, let’s all take a look at where the map is sending her.”

Her cutie mark was floating above a small, yet elegant town. Twilight proudly announced, loud enough to make a show of it to all the students, “Congratulations, Starlight Glimmer! It looks like you’ll be going on a journey to the Hifalutin Heights!”

Did she say “Hifalutin Heights”?! She couldn’t have heard that right, could she have? Starlight thought the place looked familiar, but she never could’ve imagined being sent there. “Hifalutin Heights?!” Starlight asked, fear visibly washing over her.

“Yup! It’s a fancy little community, resting high about Mount Marevolent,” Twilight explained.

“I know.” Starlight groaned. “And everypony who lives there thinks they’re so much better than anypony else.” She put her head in her hooves and kneeled down in distress.

The room was silent. It seemed as though Starlight had some kind of history with the town. Twilight tried to ease the awkward vibes being given off. “Well, I don’t know about that. Certainly, the ponies do live a lavish lifestyle there. In fact, it’s sometimes called a ‘mini Canterlot,’” Twilight explained, turning to her class and projecting her voice, subtly suggesting that they should be taking notes on this.

“Oh, I know!” Starlight strained her voice. “But Canterlot is just too open to the public for the ponies who live there!” she explained. “No, only this tiny town on the hills, far away from any ‘lesser’ ponies can suit the ‘better than you’ lifestyle of the ponies who live here!” the perverted mare ranted.

Now Twilight was really confused. “Um, sounds like you have some experience with this place there, Starlight. That’s great! See, class? The map always knows the ponies who are exactly right for the job! It must’ve known about her history here.” Twilight tried her best to hide her concern about her friend’s behavior as her students were present. “But for the rest of us, do you mind explaining what exactly your history is there?” she put on her best teacher voice, trying to remind Starlight to stay professional.

“Ugh!” Starlight groaned, almost forgetting there was an entire school-worth of developing young foals surrounding her, all with their glorious flanks just out of her view. That thought just had to come back to her as she’s supposed to be explaining her history, huh? The history that may just be behind this perversion of hers in the first place, no less.

“Okay, everypony’s staring. Twilight’s getting worried. Is she on to me?!” Starlight thought nervously. Sweat poured off of every inch of her body. She gulped. “Hifalutin Heights is where—Well, it’s… sigh It’s where my mom lives, okay?” Starlight finally explained. “I haven’t seen her since I was…” she looked around and found the youngest kids in the school, little fillies too sweet and innocent to even question her strange behavior, “…their age.” She pointed at them. The little foals looked directly up at her and gave the cutest little “O-face” she’d ever seen, surprised to have this attention drawn directly to them for this brief moment. Starlight then got even more intensely nervous. Pointing out a bunch of little fillies? Was that a bad look? Especially given her feelings about them?! No, she was just, uh—demonstrating the age. Yeah, that’s all! She tried to convince herself that she wasn’t creepy. She looked away and blushed, giving an awkward scrunchy mouth expression as she did. “Smooth,” she sarcastically quipped to herself in her mind.

“Oh, how amazing!” Twilight said, obliviously. “I’m sure your mom will love rekindling with you again after all these years!”

Starlight rolled her eyes. “What a dumbass,” she thought.

“Who knows?” Twilight added, once again attempting to turn this painful experience of Starlight’s into a teaching opportunity for the students. “Maybe Starlight’s relationship with her mom could even be at the center of whatever the friendship problem the map called her to solve is.”

Starlight gave a passive-aggressive facehoof. “She’s not even trying to listen to me!” Starlight thought.

“Look, Twilight, I’m sure the map has very good intentions and I’d never intentionally go against a friendship lesson,” Starlight tried her best to be diplomatic, “but I just can’t go!” she finally said.

The whole school gasped in shock. Twilight angrily glared at her for discounting the important lesson she was trying to teach. But ever trying to be the bigger pony, Twilight didn’t argue. She controlled herself and made a public show of comforting Starlight. This humiliating scene happening in front of all those kids actually had the opposite effect on Starlight, but even if Twilight knew that, it probably wouldn’t matter to her. It wasn’t actually about being a good friend to Starlight. What really mattered to the headmare was making a show of her friendliness and justifying her image as the Princess of Friendship to everypony else.

“Now, Starlight,” Twilight condescendingly said, “you don’t have to be worried. The Cutie Map is powered by the magic of friendship! And friendship always wins at the end of the day!” She gave a huge grin and gave Starlight a half-hug, glancing at the students the whole time to make sure they were all diligently taking notes. Of course, they were all jotting so much down that they were looking for extra space in the margins of their notebooks. Twilight taught them well; learning friendship means having no respect for other ponies’ privacy, especially not if Twilight happened to have employed them.

She let go of Starlight and looked back at her, more naturally attempting to provide much needed reassurance. “And besides, you won’t be going alone. The map almost always sends two friends along,” Twilight reminded her.

This was actually somewhat comforting. Starlight had begun to forget that herself for a moment there. She wondered who it would be. “Sunbust? Trixie? Maud?” Starlight had so many friends who she could be more open around. Even if it were Twilight or one of her friends, she was starting to think that that sounded okay. After all, it’d be an opportunity to come clean about her secret and to finally get out of this temptational job of hers. Having that alone time with one of them would allow her to feel more comfortable in revealing the truth. And if some part of the mystery of these evil urges happened to become clear upon one of them meeting her mother, then that’d be good to.

Starlight was now feeling confident. “Yes!” she thought to herself. “This is the perfect opportunity to finally open up about my regretful desires!” Sure Twilight meant well in giving her this job, but she just wasn’t able to live a lie. She needed help. She wasn’t totally beyond redemption, but she needed to come clean and only spend time around ponies her own age. This trip was the perfect opportunity for that.

“You know what?” Starlight said aloud. “I think you’re right, Twilight! With a friend by my side, this challenge will be so much easier.”

Twilight proudly grinned at her. It was nice to hear Starlight give a positive affirmation of her lessons for a change. She’d just about had all she could take of the constant sarcasm and disregarding of the truth about the magic of friendship. And it was just a little bit of bonus points to be able to be seen as such a good teacher to all her students. She tried to stop herself from making sure they were all taking notes, but couldn’t help checking with the corner of her eye.

“So, who will I be going with, anyway?” Starlight asked.

“See for yourself!” Twilight grinned and pointed back at the map.

A crimson cutie mark was floating up in the same spot, revealing itself to Starlight as it slowly came up behind her own. “Damn! Not Trixie!” she thought right away. Whose was it, though? She wondered. “Not Starburst’s. Definitely not Maud’s.” Did any of Twilight’s friends’ look anything like that? She thought about them and was pretty sure she wasn’t forgetting any when she ruled them out. What was this cutie mark of anyway? It had square edges at the top. The rest seemed to be, like, a pillar or something? “Oh! It’s a chess piece!” she realized. “I think that one’s called a rook? Now, whose cutie mark looks like that?” She thought it seemed familiar, but she just couldn’t place it. Suddenly, it occurred to her. Wasn’t this symbol in a flank that she’d spent untold amounts of hours trying not to stare at?! “No… it couldn’t be,” she thought. The map would never send her alone with—

“ME!!!!” an instantly recognizable sweet and adorable voice from behind said.

“Oh, no!” Starlight thought to herself.

Cozy Glow slowly flew into the room and delicately landed on Starlight’s back. Starlight shook with horny anticipation far surpassing what she’d ever felt before. Cozy Glow turned around and showed off her amazing, sexy, tight, perfect filly flank, complete with a glowing cutie mark to everypony. It was right in Starlight’s face!!!

A roadtrip with her?! This couldn’t possibly end well! How was Starlight going to keep her secret with this amount of temptation?! Even back when she ran her own town of brainwashed ponies, she didn’t have as much time alone with them as this would require of her! She gulped and blushed bright red. How was she going to control herself?! What will happen to her if her deepest, darkest, evil secret came to light this way?!!?!!?! (The little filly’s tight little ass was still pointing right in her face!) HOW WOULD SHE EVER CONTROL HERSELF?! She began to panic worse than she ever had before. As if going to visit her mom weren’t bad enough! Now she has to add the temptation of the unintentional seduction this perfect little foal—the one of whom Starlight seemed to had been dreaming of her whole life, sexier than anypony she ever could’ve imagined existing—alone with her the whole way!!!