Author's Note

All characters involved are over 18

Shining Armour

Shining Armor’s wife and sister were having an affair.

That was all he could really think about as he stood at the train station with his family. Twilight was checking the itinerary for the eighth time that morning and Cadence was hugging Flurry goodbye. Their twenty year old daughter was now a full head taller than Cadence and had really come into her own.

But all Shining could think about was that Cadence and Twilight were having an affair.

He found out last night. Every year, Twilight and Cadence left for a week on a girl's only get-away, catching up and having fun together. At first, the night had gone well enough. As a goodbye present, Cadence had ridden Shining to within an inch of his life, taking every ounce of liquid cum his dick could muster. When he filled up her asshole on round three, she’d screamed so loud that Flurry Heart actually burst in to check on them, surrounded by guards.

Of course, their daughter immediately turned bright red and ushered the guards out of the room, so as to give her parents some privacy. Shining smiled at the memory. He smiled less at the other memory that came to him.

He'd been awoken by a strange sound and found Cadence's spot in their bed empty. He rubbed the sleep from his tired eyes, blinking wearily and sitting up. The room was dark, Cadence wasn’t at her desk or on the balcony. He shrugged, there were any number of places Cadence might be at this hour. But as long as he was up, he could use a glass of water.
So he climbed out of bed, pulling on a pair of boxer shorts and wandering down the hallway of the dark, quiet sleeping wing of the royal palace. Something was off. Was it in the echo of his bare footsteps? Or the emptiness of the--
Guards. The guards weren’t at their posts. Again, Shining rubbed his eyes, sure that exhaustion was just playing tricks on him. Obviously the guards were on duty, they’d burst into his room earlier that night with Flurry.

“Best to just check on the other’s, make sure they’re safe.”

And so he strode down the hallway, his pace faster with each step, though he kept his footsteps as light as he could. Best not to make any noise. If there truly was an ominous reason for the guards to be missing, he’d rather not draw attention to himself.

Around two corners he strode until he found the hallway entrance to Flurry’s room.

There was a strange sound coming from within. A gasping, panting sound and-- Moaning. Shining knew exactly what that sound was, he wasn’t an idiot. Though he’d rather not take any chances. And so he crouched down next to the door and a faint blue light glowed from his horn and then in his hand. He pressed his palm against the door, opening a one way magical mirror on the surface of the wood, letting him peek in without being seen.

His jaw almost hit the ground, he almost fell back at the sight of it. Flurry, his precious girl just barely out of university, was on her hands and knees, taking the dicks of two of his guards. One up her mouth, whilst one pounded her from behind, his firm hands clutching her rounded ass. With each, powerful thrust he caused her to moan onto the throbbing cock of the second guard, the one she was blowing.

On the bed beside them were three other guards. Two other men, watching Flurry with eager, hungry eyes, their hands on each other’s meat, rubbing up and down.

Shining stepped back, ending the spell, eyes like saucers and heart pounding in his chest. Of course he knew Flurry wasn’t a virgin anymore, she’d had boyfriends and she’d spoken to Cadence about sex, or at least that’s what Cadence had said. But Shining had no idea that this was the extent of her sex life.

He rubbed his head as he staggered down the hallway. At least he now knew where his guards were. Wrapped up with his daughter in-- arguably one of the more erotic sights he’d seen in the last few months.

But even as he got further from Flurry's room, the sounds of moaning did not stop. He just found new ones. He followed them all the way to Twilight's room. And there he saw them, revealed through a crack in the door, his wife and sister locked in a firm sixty nine. Fingers gripping each other's hips, moaning into each other's heats.

Finding out hadn’t really shocked him that much. After all, Cadence was the Princess of love and affection. They’d experimented with an open relationship in the past and tried to cultivate sex positivity within their house and across the Crystal Empire. Many crystal ponies, to their credit, had taken to this idea with gusto. Their royal guard had also been transformed by Cadence using similar methods. It wasn’t uncommon to pass by the barracks and hear the echoes of moaning from the other side of the door.

It was good for morale and, as Cadence said, many disputes could be solved through fucking.

Not all, of course, consent was still a serious consideration taught to the guards by Cadence and Shining Armor. If the problem couldn’t be solved through sex, then it was often best to solve the problem by other means. But Cadence still held to her original statement regarding sex and the qualms it could solve.

And Shining Armor was going to test that theory, for a whole week.
Because his wife and sister were having an affair.

So he wore a friendly smile as he stood with his family at the train station. He embraced Cadence, whispering his farewells in her ear before kissing Cadence on the lips. She smiled at him and turned to Twilight, laying a hand on her shoulder. The two women giggled at the contact and Shining shook his head and rolled his eyes.

“See you next week,” Twilight said over her shoulder as she and Cadence climbed aboard the train for their week-long holiday.

“Don’t have too much fun without me!” Shining responded, standing and watching the train leave.

On his way to his chambers, Shining Armor stopped in his office. Opening the third draw in his desk revealed a stack of paperwork, all boring stuff about guard deployments and farming agreements. Perfect for hiding the secret underneath. Shining lifted up the papers and reached his hand below to grab his favorite toy. A small cylindrical device, mostly metal, carved with magical runes. In its center, a perfectly clear crystal that pulsed with a magical glow.

He grinned, memories already returning from the last time he used the device. It had been long before he discovered the affair Cadence and Twilight were having. Hell, it was the reason he knew he couldn't be upset at what he'd learned. Stones and glass houses, and all that.

Shining Armor returned to his chambers in the Crystal Palace and set the device on the sheets of his bed. He held down the center switch for thirty seconds and released once the gemstone started glowing red. Magic gently wafted through the air, escaping the device as the barriers of their universe were being weakened. He didn't know how long it would take for her to respond, so he turned on his heels and walked to the shower. He could do with some freshening up, first.

He was so preoccupied in thought that he didn’t hear the sound of the device in the other room, or hear the door to the bathroom opening. It only became apparent to him when two slender hands wrapped gently around his chest and a strong, feminine body pressed up against him. For a moment he tensed at the surprise, but his muscles quickly relaxed when she spoke into his ear.

“It’s time for Cadence and Twilight’s fucktacular weekend away already?”

“I don’t want to talk about them right now,” Shining said as he turned his head to the side and kissed the woman pressed up behind him. Their lips met gently and her breasts rubbed up against his back. She slip one of her hands down his chest and stomach all the way down to his cock, stroking it slowly. Shining hummed into the kiss as his member started to harden to a semi, before breaking the kiss and turning around, facing the perfect female copy of himself.

Gleaming Shield flashed him a wide grin in between the strands of long wet blue hair now plastering her damp face as she slid her arms around his body, pulling him in close for a kiss. Shining ran his hands up her back, right before one slid down and cupped her ass. Her breasts pressed against his chest and his cock was trapped in between her thighs, rubbing at the entrance to her pussy.

For a moment they stayed there, fiercely making out and rubbing themselves against each other, gasping and moaning into his other's mouths, tongues wrestling for dominance. But then Shining broke the kiss away from her lips, only to bring his attention to her neck. Gleaming turned her head to the side, giving him more space to work with. She let out a quiet squeak as Shining started moving lower, kissing down to her chest. His lips latched onto a nipple, sucking it firmly. For a moment he remained there, happy to give attention to her excellent breasts. But Gleaming's hands found their way to his shoulder and head, pushing him further down until finally his face was between her thighs.

Even as the water kept pouring down their naked bodies Shining set to work on Gleaming's clit. He captured the little pleasure nub between his lips and for a moment he just sucked on it, enjoying the feel and texture against his lips and tongue. And then Gleaming's fingers, gripping his hair, tightened their hold. Get to work they were telling him.

And so he obliged her, tongue going to work, teasing her clit with repeated, decisive movements.
Gleaming's hands did not loosen their grip but judging by the moans escaping her lips she was enjoying herself. So Shining continued, lowering his head slightly to eat her out. And as his tongue slipped between her pussy lips Gleaming's bare foot found his semi-erect dick. She ran her foot up and down its length and as she did, Shining gasped into her hips.

As his cock grew harder, Ahining redoubled his efforts, alternating between eating out her pussy and tending to her clit.
I'm cheating on my wife Shining thought, I'm kneeling in the shower eating out my own double, cheating on my wife who's probably finger fucking my sister in the bathroom of a public train right now.

This thought was enough to push Shining over the edge. His hands suddenly gripped Gleaming's bare ass as he launched his tongue inside of her with greater fervor than before. One hand released her ass cheek so that it could rise upward to grip a large breast. He groped and squeezed it and pinched her nipple. Gleaming's moans rose well above the roar of the shower's spray. She sped up her own work, her foot doing wondrous stuff to his dick. Her hand on his head for balance until, together, they both came.

Cum burst out from his cock, shooting past Gleaming and spraying across the shower floor. Mare cum cascaded into Shining's mouth and he drank it up greedily until both their moans turned to heaving, heavy breaths. Finally Shining untangled his lips from his double's cunt and looked up at her.

She cupped his face in her hands and smiled, "Hope you've got more in the tank, I am NOT returning to my dimension until I've taken every inch of you!"

Shining flashed a grin as he stood up and pulled her body against his. He kissed her deeply and passionately, their tongues rolling over each other and eyes closed. Gleaming sucked in a deep breath that pressed her breasts against his powerful chest and they hung there for an incredible moment. Once more, Shining Armor's dick was growing turning to stone, rising and straightening and ready for more. His hands explored up and down her sides and their hips gently ground together until he was once again a full mast. "I've got much more for you," he whispered, finally breaking away from the kiss. His horn glowed a soft blue as he magically turned off the water, then lowered his hands down to Gleaming's thighs and, in a strong and swift motion, lifted her up. Gleaming laughed! Wrapping her legs around his waist to brace herself and, in a single smooth motion, lowered herself onto his cock. His eyes closed as he braced himself for the penetration. And when he was done, Gleaming kissed him again, grinding her hips and beginning their love making in earnest.

But it was not love making, there was no love between them. In fact, Gleaming was beginning to get that glint of mischief in her eye that Shining was becoming so very familiar with by now. As she pulled away from the kiss, he could already see that she was about to say something to make him mad.

"Castle's empty," Gleaming said, "You wanna cheat on your wife in your bed, or your daughter's?"

Soaking wet from the shower water, Shining carried Gleaming into the bedroom. She gyrated her hips against his, working his meaty cock inside of her as he walked. He had to guess where his bed was, he couldn’t see a damn thing past the tits his double was shoving in his face. For a moment he gave up trying to find somewhere and just stood there, his feet on the the carpeted floor, the warm air of the bedroom embracing them both and instead found himself a wall. He shoved Gleaming against that wall, causing her to gasp as the air was forced from her body by the impact. She grinned down at him, wickedness in her eyes.

“Someone’s feeling rough,” she teased, "Did I hit a nerve?"

Shining did not look up at her, instead focusing on the tasks, well.. tits... right before his eyes. His took one in his mouth, his lips closing over one of Gleaming’s nipples and sucking, his tongue swirling over the pink nub, all the while she continued to grind her hips on his cock. His breathing was ragged and staccato as his thick dick filled her up. Gleaming’s moans were dragged out, slow and lewd. Her hands gripped his hair tight, pulling and squeezing. One hand left his hair and grabbed at his shoulder, digging her nails in. His teeth bit down on her nipple and she let out a little squeal.

“Yes, Shining, fuck me! Fuck yourself! Is this how you fuck your wife? Or is this how she fucks your sister?”
Shining scowled and pulled out of Gleaming, dropping her to the floor. Her evil eyes winked with mischief as their expressions locked together.

“Awww, what’s the matter?” Gleaming teased, “Did I hurt the big boy’s feelings?”

Shining gripped Gleaming by the shoulders and dragged her across to the bed, throwing her onto her hands and knees. She cackled, wiggling her hips at him as he approached, ready for him to mount her from behind. Shining kneeled behind her, knees on the mattress, hands on her ass as he lined up his cock with her pussy and drove himself deep into her. Gleaming arched her back and moaned, trying to maintain some kind of composure at first.

"Is this how you like to fuck her?" Gleaming asked through heated breaths, "Oh Celestia it's good. Is this how you fuck your wife with that big cock of your's? It's how my husband fucks me on our bed! You should come to my dimension some time, fuck me on my bed!"

At this, Shining Armor upped his pace until he was slamming his hips into her. Gleaming would find, Shining mused, that she couldn't speak or goad him if he just fucked her senseless, and so that's what he did. Holding tightly to her ass and sending powerful thrust after powerful thrust into her, he robbed Gleaming of her words. Her head dropped down and fingers gripped the blanket as she just tried to stay upright.

Shining reached forward with one of his hands, gripped her by the back of the neck and shoved downwards until her face was smushed into the pillows. Gleaming's hands splayed to either side as she moaned, grunted and gasped into the pillows, eyes wide, breath heavy, her pleasured howls filling the room until finally Shining came once again. Shining pumped through the orgasm, ensuring that as much of his cum as possible filled the woman, breeding her, making his mark on her.

He pulled out and collapsed onto the bed, desperately trying to suck in his breath as Gleaming rolled herself over and propped her head up on one hand. "And now," she said with a spiteful smile, "You understand why I like pissing you off."
She shifted herself onto her back and beckoned Shining over. He crawled on top of her, weariness already starting to reach his muscles as he leaned down to kiss her on the lips.

Her hands ran the length of his strong, sweaty chest and slid down to his limp cock. "I'm gonna need a few more minutes," Shining said through the kisses. "That's alright," Gleaming said, spreading her legs below him. "Because you've made an awful mess down there, and I only came close to finishing. I'll need you to do the honors."

Shining Armor's lips lowered down Gleaming's body. "I've been considering your situation," she said, humming thoughtfully as Shining began his work, once more eating the counter-part out with a thorough, growing vigor. As he did, he tasted his own cum leaking out from inside of her. He never thought much of the taste but continued on regardless.

"You're doing this to get back at your wife for fucking your sister behind your back. But, ahhhhh yes that's right, keep your tongue there, keep doing that. Mhmmm, yes. You're fucking... me, having an affair...ngnnn... with me, because you think that's an equivalent affair to have." Shining peered up at her, slowing his work slightly as he did so. "Back to it," Gleaming said sternly, before continuing her train of thought.

As she spoke, Shining's tongue and mouth did their work, getting the woman further and further to a second climax. He sucked on her clit and gently nipped at it with his teeth, working it relentlessly before slipping down to her pussy and sliding his tongue inside it, kissing and licking and lavishing her heat with his attention.

And Gleaming continued to speak. "But I'm just you, really it's just masturbation. What you should really do is fuck Twilight." Again Shining Armor looked up, his attention snapping to Gleaming's eyes as she grinned wickedly down at him. "Oh yeah, I have your attention now, don't I?"

"It's not happening, don't be a degenerate," Shining snapped. He tried to say more but Gleaming's hand took his head and shoved it back down between her legs, forcing him to keep going. And keep going he did, his arousal overriding his senses.

"Come come now, don't be a prude. We both know that if she said yes, you'd bend your sister over this very bed and fuck her stupid," Gleaming said through whimpers and moans, her hips bucking and grinding against Shining's face. "You want to fuck your sister, I know you do. Ooohhhh yes, oh yes I'm close, keep going! And I know you want to fuck your sister because, I'm you. And you would not believe the stuff that my brother and I have got up to in the dark."

Shining could not help the stiff swelling from between his legs, not just at the lewd act his was already performing, eating Gleaming out here in the same place he slept with his wife, this place so scared to them that, from what Shining could tell, even Cadence and Twilight had not brought their affair here. No, he was hardening over the truth of the matter. Twilight Sparkle was a beautiful woman and when he saw his wife and sister locked in the throes of passion, Shining Armor did not only have eyes for his wife.

He heard his sister moan and it brought unacceptable thoughts to his head. Thoughts that he could not disperse. Thought's that he--

"But that's not good enough," Gleaming said, interrupting Shining's train of thought. Her voice was pitched, high and quavering as she neared her peak. "Because you...nghnnnnn, AHHHHHH, you can't just get even with Cadence. You have to beat her." Something glinted in Gleaming's eye. "Your daughter has grown up into a fine young woman."

That was too far.

Shining Armor sat up, pulling away from the sweaty Gleaming Shield, her chest rising and falling rapidly as she sat so close to cumming yet again. "Don't you say another fucking word," Shining snarled, but Gleaming wasn't done, she only shifted until she was on her knees, upright and facing him. Her body, strong and powerful from years of military training just like Shining. There was a dangerous tension in her shoulders, a strength and resolve in the set of her jaw.

She was fucking gorgeous. "If you don't want to do it, that's alright," she growled, her voice taking on the same tone of anger as Shining, but her's put on for effect, not born from a genuine source of rage, "That's fine. I can do it for you." Her lips curled upward into a twisted smile. "Imagine me, fucking beautiful Flurry. My lips between her legs, my teeth on her nipples, our pussies pressed together." As she spoke, Gleaming's hands had moved between both of their legs, her fingers slipping between her lower lips and gripping Shining's cock with a roughness, jerking it in harsh strokes.

"You won't do a thing to her," Shining said, angry and horny and confused and--

Gleaming pressed her lips to Shining's and he lost the last of his control. He shoved Gleaming in the chest with all his strength, sending her sprawling onto the bed. And then he climbed on top of her and buried his cock down to the hilt in her cunt. Gleaming's moans shook the room as Shining's hips worked her harder than ever before. Hands explored bodies, asses were grabbed, breasts were groped, nipples squeezed, necks kissed and sucks and bitten. Their tongues battled in each other's mouths and Gleaming moaned and mewled even as Shining grunted profanities until finally, with explosive force, Shining Armor came.

He exploded cum inside of her, more and more of the white liquid, filling her up once more with everything he had, thrusting through the peaks and rise and fall of the orgasm as Gleaming shrieked and howled, cumming for the second time until finally their sweaty bodies came to rest and Shining rolled off Gleaming. Their long, sweaty blue hair was tangled together across the pillows, their sweat mingled on each other's bodies and rising chests.

Gleaming turned to Shining and flashed a shit eating grin. "It's so much fun pissing you off, y'know that?"

Shining's bleary eyes opened slowly as the new morning sun glinted through the windows. He groaned and scrunched up his nose, raising a hand to his face and trying to rub the sleep out of his eyes. Gleaming had used him twice more before they'd gone to bed and his body was already complaining at its treatment. But, finally, with some effort Shining was able to sit up and turned to where Gleaming slept.

Except she wasn't there. And the door to the bedroom was open. Panic rising in Shining, he climbed out of the bed, walking naked to the far side of the room and opening the door, peering down the hallways to see if he could spot Gleaming or any sign of where she'd gone.
When that gave no answers, Shining turned on his heels and went back to the bed, where he found, on her side, a picture of Flurry Heart. He didn't remember that being there before, and picked it up, turning it around. The text on the back read: "Hey, since you won't show her a good time, then I guess I'll have to do it!"