Author's Note

My first attempt at writing some corruption or sluttification that will take a bit longer to be completed, meaning that Twilight might resist at first a bit, and for quite some time find excuses for her actions. Also of note is that there will be probably only one gangbang in this story. So this is really something new for me, and this also considers the Stealth Sex part.

Also note that this is a story where Flash Sentry is not getting a 'Happy Ending'. This is nonconsensual cheating after all! This is Netorare! Just so that you were warned.

With that being said, I'm open for critique and hope you enjoy it!

The First Step

Happiness. A stage Twilight was quite sure she had reached with her coltfriend Flash Sentry. All couples would always say that they were happy together. And Twilight was, in a way. But things were not always as easy, especially considering their kind of relationship.

Twilight was having a long distance relationship with Flash, as he had guard duty in the Crystal Empire to attend. Some might think now that he should just guard her palace, but paperwork is a fickle mistress. Even a princess couldn’t just do whatever she wanted. And she certainly couldn’t do it to quench her burning libido.

One of the downsides of her new alicorn body. Her high metabolism might have helped her to keep a rather slender and sensual frame, not to mention that her sense of hearing or taste were also heightened. Unfortunately, this was also valid for her more…private needs. And a long distance relationship was poison for that particular need.

Despite that, or because of that, Twilight and Flash were quite sexually active whenever he came to visit her once a month. They would often fornicate, even during short breaks from her royal duties. Twilight’s sex drive and lust seemingly had no limit.

So you could say that things went rather well for her. She was even becoming friends with Flash’s old flight school friend Thunderlane. Her coltfriend had introduced them at one point as they went out together. She was a bit skeptical of him at first, as he was known to be the Ponyville playboy, but he turned out to be quite the decent guy once she got to know him. He was some pony she could talk to normally and who would treat her normally in return, and not like some untouchable princess. It was good for her to have a shoulder to cry on.

Too bad the problem she faced now was much too intimate to discuss with him. Both of them were currently sitting in a bar, Thunderlane being the one who invited her after seeing her rather grumpy mood. She all too eagerly accepted as she had finished the work for the day and she definitely needed to relax in the evening. And if she just did it to deter her thoughts from that letter she received that day…

Twilight let out a sigh as she was seated at the table of a bar, her chin resting in one of her hands. Her rather generous E-cup bosom was stretching against her white choker. A short black skirt was hugging her sensual hips as she was sitting down, displaying her perfectly long legs. She was super model material, and it wasn’t farfetched to say that quite a few stallions would jerk off in the night to her image. Something that made Twilight quite proud considering she was once the nerdy librarian type stallions would rarely speak to.

Opposite of her sat Thunderlane. The slightly muscular pegasus was sipping on his drink. He was wearing blue jeans and a black shirt, both were hugging his body perfectly and showing off his features. He was a rather attractive specimen as he wasn’t bulging with muscles, but showed off a more slim and athletic frame.

Twilight followed the arm that held his drink, intently looking at his flexing abs, a small line of drool escaping her mouth for a moment.

Her eyes widened the moment she noticed her staring and her cheeks flushed. She quickly wiped the line of drool away, praying that Thunderlane didn’t see that.

Unbeknownst to her he did.

‘Snap out of it! Thunderlane is your coltfriends friend!’ she chided herself, as she nervously looked from her drink to Thunderlane and back. An unmistakable heat developed in her loins as she looked him over, making her fidget in place. It was really frustrating.

“Are you okay?” Thunderlane asked as he noticed her discomfort.

Twilight sighed in frustration as she answered before even thinking.

“Not at all. I mean, how am I supposed to stay calm if Flash isn’t coming down for a whole month?! This is driving my libido completely crazy!” she said, surprising herself as she suddenly vocalized her thoughts. Panic immediately claimed her heart as her head flushed red with embarrassment even more and she immediately opted to correct herself. “I-I mean, I’m great!”

“Oh, is that so? You know that you can talk about your… little problem with me. Heck, me and Flash go way back. So you don’t have to feel embarrassed over something like this.”

“I…”

“Hey, that’s what friends are there for,” he gave her a smile.

A smile that she nervously returned. Maybe she should really tell him. It might help her.

“Well, it’s just that Flash is not here at the moment, like he usually would be.”

Thunderlane nodded at that.

“Yeah. He didn’t get his leave like usual.”

“Yeah… It’s just that I’m…sexually…frustrated. You may not know this, but an alicorn body has a higher sex drive. He normally would be here to help me with that, but now he isn’t and I have the feeling I’m going mad!”

Her wordswhich started out slightly nervous, quickly bordered into frustration, as she threw her hands up in the air at the end and then laid her head on the table.

“I just wished I had a possibility to get this under control…”

Twilight couldn’t see Thunderlane’s face, otherwise she would have noticed the smirk on his face. With that he decided to take action.

He heaved up his leg and slowly and delicately pressed the tip of his hoof against the princess’s panties.

“Ahh~mmphf!” she cut herself up mid moan with a hand and her eyes immediately went around to see if she was noticed. Luckily for her there was only one other table with guests and they were far enough away to not hear the lewd sound she let out.

After that, her eyes landed back on Thunderlane. Surprise still evident on her face. He however only gave her a worried smile.

“I can help you with your needs,” as if to emphasize his point, he circled with the tip of his hoof against her panties and with that against her labia, teasing the horny alicorn. He enjoyed the fleshy feel of it as he was feeling her up. A distinct wetness was also growing while he was doing this.

Twilight meanwhile bit in her arm, trying to muffle her moans, as she was enjoying herself. Her glazed over eyes said it all, she wanted him to keep going. And that’s what he did.

Fortunately or unfortunately, only a moment later she seemed to snap out of it in panic.

“I-I-I’m perfectly finahhh! Y-You don’t need to do this!” she whisper-moaned out.

Thunderlane just held his smile.

“Oh princess, I insist. What friend would I be if I don’t help my friend’s marefriend to blow off some steam every now and then? It’s no trouble for me at all.”

He then put more pressure on his hoof, sinking the tip together with her panties slowly into her pussy, making her quiver, as she started to sweat profusely.

The slight wetness developed into a raging river, soaking her entire panties and making them a complete mess. The scent of her arousal also filled both the air and Thunderlane’s nostrils. He could feel his cock bulging against his jeans, begging for sweet relief.

Twilight panted heavily as she suddenly clenched her drink with her free hand as if she was holding on for dear life.

“P-Please d-d-don’t,” she stuttered out as Thunderlane continued to prod her needy hole with the tip of his hoof.

“Why not?” he asked innocently with a cocky edge in his voice.

His hoof meanwhile began to wander further upwards, until it found a small protrusion. It was standing at attention, just waiting for a stallion to touch this delicate and rather sensitive button…

…Thunderlane all too readily complied as the tip of his hoof suddenly bumped against her rock-hard clit.

Twilight let out a loud gasp, not able to form a response to his question as she was trying desperately to get her treacherous body under control. Her gasp was loud enough to draw some attention to her. Her whole body trembled as her head was growing a darker shade of red. She could already feel the eyes of other ponies on her. She let out a barely audible whimper that would make Fluttershy proud, before she stood up and bolted for the restroom.

“Havetogotothetoiletberightback!”

She made a beeline for the toilets. Her own juices were leaking down her legs all the while. The translucent fluid was glistening in the lighting of the bar lamps.

Thunderline smirked at that and decided to follow the horny princess.

Twilight immediately entered a stall and pulled her sopping panties down. She sat down and plunged her finger without any hesitation into her damp love canal. Her other arm was used to stifle her moans as she arched her back with every plunge of her fingers.

Her juices quickly leaked out of her, down her legs and onto the stall floor. But that was something she could later take care of. Her body demanded release right now! And all of that trouble because Thunderlane thought it was a good idea to touch her there!

‘Thunderlane…’ Twilight thought. She had to admit that he was quite the attractive stallion. And the movement of his hoof… How he circled it around her wet lips, teased her clit… If she would have stayed there, he surely would have brought her over the edge, in the middle of the bar.

A part of her wanted this to happen.

“Mmphf~!” she moaned out once more as her fingers hit a particularly sensitive spot.

Her walls clenched around the three fingers that she was currently driving inside her sweet honeypot. She could feel the immense heat that was radiating from her pussy through said appendages. Her coat was completely damp from her sweat, and she panted heavily through the arm that muffled her orgasmic cries.

She was so close.

Unfortunately she forgot rule number one while furiously masturbating in a public toilet stall:

Always lock the door.

Said door swung open and a lewdly grinning Thunderlane stepped in. To say Twilight was surprised would be like saying that her crotch was slightly damp. She was in the mares’ bathroom after all.

Her whole body had tensed, and she held her breath as he stepped into her stall. He quickly closed the door behind him and with a resounding ‘click’ locked it.

Twilight found her love tunnel, much to her shame, winking at the grinning stallion. And even more to her shame she couldn’t help but fantasize about all the things he would do to her. Thunderlane, the friend of her coltfriend Flash. This morbid curiosity edged her on, despite her best efforts to bring the heat in her loins back under control.

It seemed like an eternity before Thunderlane spoke up.

“You know, I said I can help you. You should stop being so pigheaded.”

He then grabbed the tent that was bulging obscenely in his jeans, drawing the princesses attention to it. She gulped nervously.

“N-No! I love Flash!”

Thunderlane only sighed as he leaned over her nervous form. His face was drawing rather close, until it was only inches from her ear.

“I’m sure he would understand. Do you really think that he wants his marefriend to suffer?”

“I-uh, no, b-but-“

He placed his hand on her thigh and started to rub along her glistening fur, slowly working his way up her skirt. A short skirt that didn’t do any good job of concealing her dripping mare parts, considering her panties were pulled down and she was lying in a rather prone position.

“I-I shouldn’t! I-“

But whatever protest she was about to utter was cut off as Thunderlane pulled his jeans down. Immediately his impressive shaft plopped free, as Thunderlane himself didn’t wear any underwear. He found this garment to be a bother when it came to having a quick fuck.

Twilight gasped as she saw the length before her. Said shaft was about 12 incredible inches long! Not to mention that it was 3 inches thick! It was a monster of a dick!

Before she could comprehend what was happening, she could feel his dick prodding at her wildly winking pussy, as Thunderlane had already lined himself up. Her eyes widened at the contact.

“W-W-WaiAHHHHHHHHHHHHHH~~” was all she brought up before Thunderlane sunk his throbbing hot flesh inside of her, sending Twilight in a world of pleasure.

The nerdy princess could hardly comprehend what was happening as she could feel her pussy being stretched around the meaty cock that was impaling her. Thunderlane himself didn’t waste any time and started thrusting instantly as soon as he had bottomed out.

Twilight’s hips bounced in rhythm to his thrusts. Twilight meanwhile could only gape open mouthed at the ceiling, her brain having crashed from the sudden penetration. Her body was much more responsive than her brain, since her walls pulsed with need and were clamping down hard on the massive member. With each time he pulled out, her walls would clench hard down on him, trying to keep him inside her wet twat.

A sudden gush of her juices made her moan out loudly as her walls flexed around the thrusting member. Her cum splattered all around Thunderlane’s cock and thighs, marking him with the scent of another mare trophy.

Twilight’s whole body spasmed and her tongue lolled out from the pleasurable jolts that ran through her entire body. Not one moment in that time did Thunderlane stop his thrusts. He relentlessly pounded the purple princess, quite intent to make her his pet.

The princess herself had no idea of his intentions though as she came back down from her orgasm, as her brain had just rebooted. She could still feel the hot flesh that was sinking down her tunnel. She then looked at Thunderlane, before the situation she was in came crushing down on her.

‘Sweet Celestia! I’m having sex with another stallion!’

She tried to calm herself down from these panicked thoughts to decide a course of action.

Her course of action being trying to push his slightly muscular chest away with her hands.

“N-N-No. W-We shouldn’t,” she tried again.

To her utter surprise Thunderlane listened to her and pulled out completely, before he slapped his with mare cum slick dick against her erected clit, making her shudder. He then continued to rub his dick along said clit, teasing the poor and horny mare.

“Are you really sure? This alicorn sex drive sounds like a serious condition. And I wouldn’t want to see my friend’s marefriend suffer like this.”

Twilight bit her bottom lip as he rubbed his cock up and down her clit and vulva.

She could still go back. It was not too late to just tell him off and then walk back to her castle. Her…empty, crystal castle, with nothing more than a lonely bedroom and a dildo to keep her company… Without feeling the pulsing warm of a stallion shaft that was so much thicker than even her biggest dildo. The feeling of her biggest dildo that would probably make her feel so incredibly…empty with her now loose cunt...

‘…Only this one time. Flash doesn’t have to know about it. And he definitely wouldn’t want me to suffer for his sake… He was too nice of a stallion for that. Yep…’

With her decision made she took a deep calming breath, before looking into the dominating eyes of her suitor. Eyes that were promising a night full of pleasure.

“P-Please…” she begged much too timidly considering her rank in society as a princess.

“Please what? I can hardly give you what you want if I don’t know it myself.”

“Please, f-fuck me.”

Thunderlane grinned.

“As you wish, Princess.”

He stripped one leg of her in mare juices soaked panties, making them wetly smack against her other leg. He then took both of her legs on his shoulders to give himself more room to thrust into this slut.

A slut she was, Twilight realized. She was now getting taken like some common street whore in the toilet of a bar.

It made her wink in anticipation.

With that Thunderlane lurched his hips forward and sheathed the helpless and needy mare on his impressive shaft. Twilight could only throw back her head and moan loudly as the hot cock was plunging into the deepest pits of her burning marehood.

The high and mighty princess could do nothing but take his hard thrusts as he was using her. Her walls all too happily were wrapped around his hot cock as it dived into her slick insides, massaging him as he did his best to rut this mare senseless.

Twilight let out a wail of pleasure as he was hitting a rather sensitive spot in her velvety soft walls. This was what she needed. What she yearned for. And Thunderlane was so much larger and thicker than Flash!

For a moment a guilty frown crossed her muzzle at that.

‘Not important!’ she declared in her mind after Thunderlane’s throbbing rod plowed into her tight snatch yet again. She needed this. And not because Thunderlane’s cock was a lot bigger than her coltfriend’s! Her biology demanded it! So what if she had some fun while following the necessities of her own biology? It wasn’t her fault! Flash surely would understand. Yes, he definitely would understand.

With that she let out a depraved sounding coo as she tried to buck her hips feebly into his strong dominant thrusts.

He then suddenly took her by her legs and waist and flipped her over. Twilight stumbled a bit in surprise as her hooves suddenly met the hard ground. But Thunderlane didn’t give her any time to recover as he bent her over and took her in the doggystyle position.

Twilight rested her arms quickly on the toilet tank to steady herself while her body was pounded forward. Each slam of his hips made her whole body rock. And even with his rapid thrusts he never seemed to tire.

It didn’t take Twilight long to get used to this new position and soon every eager thrust of Thunderlane was expected and wanted by the slutty princess, as she pumped her hips back into his thrusts with gusto.

Thunderlane meanwhile let his hands wander over the form of this voluptuous princess. He started with laying his hands on her cutie marks and giving them a tight squeeze, kneading them. Since the cutie mark was an erogenous zone Twilight could only voice her approval in a lusty cry of pleasure. He then went further up, his hands taking the white choker she was still wearing with him to reveal his prize. It didn’t take long for him to find the jackpot.

He immediately grabbed her enormous tits with both of his hands and started to massage them through her bra. Twilight’s arousal jumped at this and her feminine walls clamped down around his shaft again, as another volley of juices was finding its way out of her pussy with a climax. A climax she all too willingly vocalized with a squeal of delight.

Thunderlane smirked.

“Never thought you were such a squirter.”

“I-I can’t help it!” Twilight tried to defend herself embarrassedly, which only encouraged Thunderlane further to lead her down onto the path of debauchery.

He quickly let his hands wander on her bra, until he found the clasp, which was comfortably on the front. He immediately got rid of the annoying thing and started to grab her bountiful breasts once again. The soft mounds of flesh felt so incredibly soft as he cupped and squeezed them. His fingers hereby wandered and quickly found her areola and Thunderlane started to pinch her nipples between his agile fingers, making the nerdy librarian squeak.

All the time Thunderlane never ceased to ram the alicorn into the wall of the restroom.

He could feel his own climax slowly approaching as he drilled into the warm and wet cavern of the princess. Her tight walls were milking him with each thrust, begging for his rich seed to be deposited into this royal cum dumpster.

Twilight was all too willingly giving her entire self to her coltfriends friend as her hips smacked lewdly back into Thunderlane’s, while she moaned.

And then suddenly a door opened.

“I can’t believe he set up a meeting for a job interview in such a shady bar only to cancel it!” came a female posh voice that was storming into the restroom.

Which was quickly followed by the hoofsteps and the voice of another.

“No need to be so grumpy, Octi. It’s his loss, really.”

Twilight’s heart started to pound rapidly. She could feel every loud bump as her nervousness skyrocketed. She was going to get found out, and that by the two most well-known musicians of Ponyville!

She yelped slightly as she could feel another heavy thrust into her. She turned her head only to see Thunderlane grinning lewdly down at her. It was clear for her then that he didn’t even plan to stop his relentless thrusting.

Twilight now bit in her arm once again, trying her best to not make a single peep, or lusty moan as the case may be.

In her efforts to stay quiet she could hear the other noises all the better. One was the noise of his soaked hips, smacking naughtily against hers.

“Do you hear that?” asked the sophisticated voice.

Her white unicorn friend nodded.

“Yeah, I do. It comes from the last stall,” she said as Twilight could hear the nearing hoofsteps.

Twilight was in fact concentrating so much on them that she forgot to properly watch her mouth as Thunderlane railed her slutty hole with force.

“Ahhhmphf~” she tried to cut her wail of pleasure short, but the damage was already done.

Unbeknownst to her the white unicorn Vinyl had a big grin on her face.

“Oh, that’s just Thunderlane, pounding one of his sluts,” she said before turning her head from her friend to the stall, “You doing good there, mate?”

“Yeah. Just giving a needy mare the treatment she asked for!” answered Thunderlane, much to Twilight’s shock, jovially. This was accompanied by the wet smacks and the muffled moans of the princess.

She could feel her walls happily wrapping around the shaft and flexing with each of his thrusts. For some unknown reason she found it harder and harder to hold her voice back. She was in some strange way enjoying how they were talking about her like that.

“W-We should go,” said the posh voice slightly nervous. Twilight couldn’t see her face, but she was sure the grey earth pony must have had a huge blush on her face.

This made Vinyl snicker.

“And miss the fun?”

Octavia gave Vinyl a look, which made the unicorn roll her eyes.

“Fine…” She then knocked on the stall. “Do me a favor and pound this mare hard for me, alright?”

Thunderlane grinned. “Will do.”

With that Twilight could hear the slowly retreating hoofsteps. Her walls were burning with pleasure as she was getting closer and closer. The same could be said about Thunderlane as he was rutting her wanton tunnel.

Just as the mares wanted to open the door of the restroom Twilight exploded and she didn’t hide it.

“CUUUMMIIIIIIIIIIIIIIIIIING~~~!” she exclaimed loudly, making the grey mare blush even deepen. Vinyl however just snickered and whispered to her a promise of a night of sweet love making once they were home, so that the sophisticated mare would learn to scream out her pleasure exactly like this slut in the stall did.

With that they left.

Twilight’s body meanwhile quaked from her orgasm as she could feel herself shoot out her mare juices again. Thunderlane meanwhile plowed her further until he hilted himself to unload his throbbing cock in her raunchy breeding hole.

Each deluge of spunk made Twilight shudder and moan out loudly. She could feel the white seed invading her innermost canal and filling it up. Her womb was slightly stretching under the virile load of the pegasus stallion.

Her wings were flapping sporadically, and Thunderlane took this opportunity to let his hands roam these appendages. He squeezed a particular sensitive spot that made Twilight shudder.

After a while she came down from her high and panted tiredly.

“T-That was g-great, but I have to go now,” she said as she pulled herself off the white messy cock. Her now completely filled vagina was practically leaking his sticky white baby batter.

Before she could move another inch however she could feel Thunderlane’s hands grip her flank tightly.

He leaned over towards her ear and breathed into it huskily.

“Oh, but I haven’t had my fill yet. You wouldn’t want to leave me, a friend, just like that with blue balls, would you? You are the PRINCESS of Friendship after all.”

“I-I, uhm…” Twilight bit her lower lip.

Before she could decide on her course of action Thunderlane grabbed her upper legs and back and flipped her completely around, holding her to his chest. He then turned around with her and pressed her back against the fragile stall door. His member followed shortly after as he pressed it against her cum-leaking breeding hole.

Thunderlane looked into her eyes, he could see her inner turmoil. But one prod of his shaft against her cum-leaking nether lips was enough to elicit a small insecure nod of her.

Thunderlane didn’t wait and immediately jackhammered her into the fragile stall door. Twilight was worried for a moment that it might break and that they would stumble into the main part of the restroom, just as another pair of mares would walk in, but a few deep plunges made Twilight relax.

She grabbed his shoulders to stabilize herself as he wetly smacked her rump with his soaked hips. The squelches of their lewd actions were resounding along the restroom, leaving no doubt that every pony who wandered in would know what was going on within seconds.

But still Twilight couldn’t stop this. She didn’t want to. Every time worry stuck out its ugly little head, a few pumps of his cock would ease her mind. The pleasurable tool was rubbing along all the right spots, making Twilight squirm from the thrusts that were delivered into her love passage.

Thunderlane grabbed both of her enormous breasts in his hands roughly, giving them a tight squeeze, before he started to suckle on one. He flicked his tongue around the erect nipple, while pinching the other in his fingers, making Twilight moan out like a bitch in heat.

The pleasure that shook her frame from the combined pounding of her pussy, as well as the teasing of her nipples was making her sling her arms around Thunderlane’s neck, like she would do with her lover.

Not that it held any value. Twilight was sure that this was a one-time thing. Yes, a one-time thing. She just needed his assistance before and he now needed her assistance since she was turning him on. Everything about this situation was perfectly natural.

Twilight squealed again as a particulary deep thrust pierced her cunt. She was getting close again. The slamming of the door behind her seemed like music in her ears, as well as the lewd splatters of her juices as she came. Thunderlane took that exact moment as he nestled his cock comfortably inside her to let loose his volleys of cum.

The streams were immediately filling up the slutty alicorn completely, as she was already carrying a load of the athletic pegasus. But with his cock working as a cork it was all trapped inside of her womb, which all too happily accepted the fertile sperm of this young virile stud. But Thunderlane’s stream didn’t seem to end and it started to strain her insides, making her belly bulge out obscenely, as if she had just eaten a five-course meal.

But the fun didn’t end there, like Twilight had expected. Thunderlane’s shaft was for some strange reason still hard. The stallion in question only gave her a grin as he started to rail her sensitive snatch yet again, making the slutty princess squeal.

“Don’t think I will be satisfied that easily. I still have quite a few shots in me and we will be occupied for at least an hour. I hope you are ready to take it all, since I plan to deposit all my cum inside of you. My lovely royal cum dumpster.”

Twilight could feel a pleasurable shudder going through her body at these degrading words, while Thunderlane simply continued to piston into her. This was definitely going to be a rather enjoyable evening.

An hour later Thunderlane left the stall with a satisfied smirk on his face. He just had bottomed up his jeans, where his thoroughly used shaft had retreated into his sheath.

Twilight herself just laid on the toilet seat almost motionlessly, only the occasional twitch of her limbs could be seen from her frail form. Her legs were spread obscenely, giving everyone who would enter the stall a look at her now gaping cunt which was oozing a river of white seed. Seed that was crammed deep up into her womb, sloshing around as her belly was bulging like that of a pregnant mare. Her enormous breasts were rather sore from all the fondling and pinching they received over the course of the last hour as they rested on Twilight’s cum-filled belly serenely. Her panties were still slung around her ankle, clinging rather lewdly to it. Her eyes were rolled far up in her head and her tongue lolled out of her mouth dumbly, giving her a rather undignified look, one that was rather unfitting for a princess of the land.

“It was a fun evening, sweetie. I hope we will have a repeat of that very soon,” Thunderlane said with a smirk over his shoulder as he walked to the door.

Once outside he pulled an ‘Out-of-Order’ sign out of his jeans pocket and hung it on the restroom. He wouldn’t want her to get spotted after all. It was better if it went without a hitch, so that she would crave his cock without worrying too much about getting caught.

One day she would come to him again, seeking the pleasure his friend Flash could never provide her. And when the time comes, he will be there and make the high and mighty Princess his fuckpet. His cock twitched at the thought.

“Soon,” he muttered as he walked into the night with a bright smile on his muzzle.