Sharing the Castle with Starlight Glimmer

by Lighttone GryphonStar

Rating: mature
Tags: Sex, Twilight Sparkle, Anthro, My Little Pony: Friendship is Magic, Fetish, Spike, Comedy, Starlight Glimmer, Porn
Length: 9243

Spike has no problems sharing the castle with his busty sister, incest is bad. However, having another mare just as busty that isn't related to him living there too might just break his strong will. Especially when she showers at the same time as him

Part 1: Even after becoming an adult, Spike had no problem still living with Twilight. Even if she's a busty mare, she's also like a sister to him. However, Starlight is just as busty and doesn't have the baggage of a familiar relationship. Nah, he can't possibly make a move. Wait, she's taking away his personal shower time too?! Fine, he'll just steal the shower from her... and rip off her bath towel... and doing everything else.

Part 2: Twilight has no problem with her brother getting laid. However, when it involves a busty mare they both have to live with... That might be going too far. Especially when Starlight starts flirting with the alicorn too.

Warning: Handjob, Blowjob, Boobjob, Pussy sex, Anal sex, DP, Futa Twilight, Threesome, Implied Incest.

Originally planned to have sequels. But I decided just to combine both parts into a single story. Part 3 will go up on the 29th. Part 4(Finale) will go up on May 3rd.

Published 2024-04-15 19:10:01 UTC
Last updated 2024-05-03 18:43:14 UTC

Part 1: SpikeXStarlight

It was an icy cold morning in Ponyville, the kind of morning where the blankets did nothing but keep one trapped for all eternity less the cold bite his scales off. Spike didn't like the a freezing morning. A reptile like himself didn't have a very high tolerance and thus cuased a low blood pressure that left him groggy, tired and extremely cranky.

So, as the young dragon sat up in his bed, he did his best not to growl as he got up. All he needed right now was a boiling hot shower to get the blood flowing again. He didn't care if Twilight was going to yell at him for using up all the hot water again, this was a dragon emergency.

With his head drooped, Spike exited his room and made his way down the hall towards the bathroom. In his half daze, he didn't hear the soft humming inside. When he got there, he was a little surprised to see that the door was open and the lights were on. Annoyed and still not able to think straightforward, he assumed Twilight left the light on... again.

Stepping inside, the warm steam was enough to register his senses. His eyes flared at the very busty shape of a mare inside. Stopped, frozen from sheer shock and no longer the cold, the dragon was left speechless at the sight hidden behind the shower curtain.

There was no way, no chance, no logical explanation. Twilight had lived with him for years and knew to leave the shower alone for him in the morning. Yet, that large busty, tight sides and beautiful hips couldn't belong to another. His head flicked away at those words an he cursed under his breath. How dare he describe Twilight in such a way. She was practically his sister. He was a full grown adult now, such perverted thoughts could not be excused at all.

Wait a minute, his mind stopped upon another realization. The dragon's head flicked back and stared at the silhouette as the steamy glass. Scanning up the sexy shape, he noticed it finally. "No wings..." He covered his mouth, hoping she didn't hear.

"What was that?!" The voice confirmed it. This wasn't Twilight, but Starlight Glimmer!

He could barely think straight, let alone speak. All those feeling he controlled around Twilight; they didn't mean a damn thing with this mare. The heat in his body was rising and his blood pressure was rising for all the wrong reasons. He spun his head back and forth, denying the temptation, yet his feet would turn to the exit.

Starlight continued to move soap over her body, the shads gives him almost complete view of everything, but still not enough. If he could just peak around the side... No, what the hell was he thinking! He didn't want to lose the trust of his newest roommate. But that was it, she was just a roommate, not a sister, or a sister like friend. Distance enough to think about without any problematics, yet merely a few feet from him.

A part of him screamed at him, telling him to run away and never return. Another, told him to take the chance. Just one look, nothing more. After all, what would be the harm? He's been around mares plenty of times. So, why should this one be any different? Rarity had him measure mares over... extremely tentatively. Fluttershy was always barely wearing much of anything. Applejack sweated so much that she swore to never wear white around him. Rainbow Dash was so bro that she tackle him, practically pelvic thrusting him into submission. And Pink Pie just kept... bouncing. Twilight was a mare he could never look at in certain ways, yet she lived in the same houses as him for years.

And now, things were different, Starlight was just as fine and busty as any of those. He didn't know if she had any restrictions at all. Plus, she was living with him. All the props of Twilight, with none of the guilt.

He was already a grown dragon. There was no need to hide anymore. He was a male and she was a female, a very sexy mare. What was the worse that could happen? He could make a move on her any time. It didn't need to be in the shower, though. His determination outwon his perversion, turning him toward the exit.

However, upon opening the icy cold true reason he ran in here in the first place hit him like the breath of a vicious wendigo. His body shook as the steam no longer protected him. "C-cold... So cold..." He shivered back into the shower and slammed the door, forgetting the obvious.

Starlight shrieked at the loud noise and kicked away the curtain. Quickly grabbing a towel to cover herself as the steam vanished. Her eyes were flaring with anger at whoever dare to interrupt her. But her rage faded into a blush upon seeing Spike there.

He turned around, urged with a mix of freezing and horror. He tried to keep a straight face and explain, but the sight of her naked body barely covered in the towel only made things worst. "I needed to..." He could feel his heart racing and the blood rushing between his legs. "I want..." His face burned as the blood rushed down to his groin.

Starlight's eyes flicked down and blushed bright upon the idea of this handsome dragon standing so close to her naked body. It had been a long time since she been around a stallion in such a way. Making thing worse was Spike often walked around naked in general. Ass a dragon, most of his parts could be neatly kept away. But given the state she was currently in front of him, she dare not look down, just in case.

"I didn't mean... I wasn't trying to... I was just trying to get warm." He quickly explained, rubbing the back of his scales. "I usually take a hot shower in the morning."

"Yeah..." Starlight accidently laughed back at his problem.

"How is that funny?!" He growled, angry pipping over his panic as his systems got colder.

She shook her head, holding back the giggle. "You see, I just used up all the hot water!!" The mare leaned back as his tall shadow over casted her form with utter horror.

Spike's eyes widened and his blood went ice cold. Rage came in at a full force and his height shot clear above her. The ravenous dragon pinned her against the wall and roar. "You wasted all my warmth!!" His eyes were flaming and his claws were gripping the wall behind her, threatening to crush it. "How could you be so selfish?! You don't have any respect for other living creatures, do you?!"

"I like hot showers..." Starlight sheepishly shivered back into her towel. The surprisingly incredible he had was a little terrifying, but also kind of sexy. She bit her lower lip and tried to hide her face, knowing that she couldn't look away.

His head twitched and the fire tipped his nostrils. "I have a dragon emergency, dammit!!" He yelled, baring his fangs and getting closer.

The mare blushed even brighter as his teeth got within inches from her face. "I-I'm sorry, Spike..." She gulped and was fearing she had made a fatal mistake. The mare had to think of a way to mend this, but how. Suddenly she yelped upon feeling something hit her gut. Her eyes flashed down and her heart skipped a beat at the sight of it. "Holy shit..." She muttered.

"What?!" Spike roared again, too dazed from the cold to realize the warmth growing below.

"Spike, I can fix this..." She paused for a moment as a single dirty thought traced through her mind. "No, that wouldn't work?"

"What?!" Spike snapped again, demanding an answer.

"And yet..." Her eyes drifted back down and her jaw gaped a little at the sheer size of it. "I mean Sunburst is longer, but that's so thick--" She was stopped as he slammed his hand, demanding answers. Trying to think of a delicate way to explain this idea, she sheepishly laughed again, but this time a bit softer. "I know of a way to warm you up..." Her arms struggled under the towel to get free.

"How--" the dragon stopped as he felt her touch him in such a way that drove him crazy. Spike gasped as a strange and very erotic sensation filled his body. His claws gripped the wall, almost breaking it. The dragon had to bite his lip, but was unable to hold back the moan. "St-Starlight..."

She giggled as his other claw let go of her. Enjoying the freedom came at a cost that she needed to pay. But this big dragon cock was more than she expected. Starlight's hand slid up and down, stroking it. It was far too thick to wrap around with one hand. Even using both hands, her fingers couldn't touch. Starlight licked her lips, wanting to give it a lick, but her own position made her pause.

Stopping for only a second, she gave a wicked smile and dropped the towel. Spike' rage faded completely as the mare's busty breast cupped around his cock and started moving back and forth.

The dragon was in shock. Not even his fantasies of Rarity had come anywhere close to this real touch. The warmth of the steam and Starlight's body was enough to get the blood flowing so good. He looked down at the sexy mare giving him such a great service. His heart raced and his breathing increased.

Starlight moaned as her breasts bounced along his massive dragon cock. The strange shape and multiple ridges hard for her to handle. The heat was a little bothersome enough, but this thing felt like solid crystal, giving her no ground for foreplay. However, his grin encouraged her to continue. She stuck out her tongue and licked the tip.

Spike leaned back a little. Starlight was a bit more aggressive and took the tip into her mouth, licking around the edges. Her hands held her breasts, trying to keep the friction going as best she could. his hips bucked as his desires grew stronger and his pleasure greater. The mare was a little taken aback, but didn't stop him. She bobbed her rack against his base, feeling the hot dragon meat.

The mare didn't expect him to cum so quickly, but the blast was powerful and the sheer volume was a lot. She tried to drink it, but couldn't take the amount and pulled back. The dragon seed was very different from a stallion, so burning hot that it felt like lava. It sprayed over her naked form like the shower head did before. She gasped and moaned at the feeling, loving the heat that covered her.

Spike was in heaven. His body was burning hot and the blood was boiling. That cold that he feared so much was no where. However, he was far from satisfied. That was the best thing he had ever felt in a while, but there was still something missing. A need to go further, a desire to defile her with all the perversion he kept hidden from the other mares.

Starlight was taken by surprise. She was barely able to move or think, just sitting there and panting. "Oh, Spike..." The mare panted heavily, looking up at him. Spike grabbed her and shoved her against the wall before she could protest.

She could feel his claws grip her tight ass and his hard cock slap her cheeks. His eyes were filled with lust and the fire inside both of them was no longer cold, but hot and wild. Starlight couldn't resist him and wanted him just as much. She dropped her head, braced her hands against the wall. Wiggling her hips at him, she offered up her pussy.

The dragon growled, taking the offer without any hesitation. Starlight's eyes widened as the tip broke through her barriers. She yelped in pain as his huge shaft pushed its way deep into her. He didn't stop and continued pushing his way deeper. She moaned, feeling her walls spread wide and her inner muscles struggling for the thick and strangely shaped cock.

Spike growled, his hips finally stopping. More than half his cock was inside her, yet his mind wasn't satisfied. The mare had no control as the dragon pulled out and then slammed back into her. She screamed in pain, but her body loved it. Her hips bucked back and forth with his thrusts, taking in more of the massive dick each time.

She cried out in bliss as the pain faded into pleasure. Spike leaned forward, growling and nuzzling his head into her neck. His claws were digging into her ass, spreading her cheeks apart as she reached his wide base. She could feel his scales rub against her skin. Her moans were louder and her body was heating up.

Starlight could feel every ridge and bump as it rubbed her walls and hit her womb. The feeling was strange and the power was amazing. The way he pounded her was making her mind numb. Every time he entered, she could feel his giant balls slap her hips, filling with white.

Spike's eyes flared with lust. His tongue was dripping saliva as he could smell her sweat. He could taste her skin as his sharp teeth grazed her neck. The dragon felt a strange sense of power and a need to dominate. Never had his body been this hot before. He felt so energized to the point he could run a full marathon in icy cold. Yet, all of his drive was put solely into beating his meat into her.

Starlight was barely able to keep herself up. Her arms were shaking and her breath was ragged. The dragon was merciless, pounding her without a single hint of exhaustion. She was lost in the sea of ecstasy, her mind blank to anything with the exception of this dragon fucking her. She wanted to say his name, but her words were only cries of pleasure.

His grip tightened as he could feel the end approaching. "Star-light..." He growled in a deep, raspy voice. He felt a rush and the world slowed down. Her body stiffened as she screamed out his name and her juices sprayed over his groin. His eyes widened as the tip flared so wide. Then a massive blast of his seed came gushing out. This was far more than before and the power was so intense that she couldn't contain it.

Her stomach bulged as it was being filled and her juices were washed away. The mare barely had enough time to enjoy the burning heat fill her, before her pussy popped off of his like a cork. Hitting the wall, as Spike was thrown to the otherside of the room. The hot dragon seed blasted out of her. His tip flare and pissed in multiple directions, pelting the walls in white hot steaming seed. Filling the bathtub to the brim with semen and the shower curtain soaked in it.

Starlight was completely numb, unable to comprehend what just happened. Her eyes rolled back as her body shut down from the sheer pleasure of it all. She could barely even realize her body was sinking into the white ooze.

Spike on the other hand was much clearer in thought. All the heat in his body made him so awake. Yet, the pleasure he felt was still very new. The dragon had no clue how he ended up across the bathroom. However, a greater problem was the mess he created. His heart shrank upon hearing Twilight's voice echo down the hall. He didn't want her to see this mess, even if the evidence would be easy to clean for him.

Quickly picking up Starlight, he blew green flames over her, vanishing the stains of semen. Doing the same to the entire room in seconds, teleporting all the seed somewhere he knew Twilight would never see it. At the bottom of the sewage pipe. With everything cleaned up, Spike peaked out of the bathroom and looked around, glad Twilight was nowhere in sight.

He turned back around and was met by Starlight's lips. Spike was shocked by the kiss, but soon closed his eyes and returned the embrace. Their lips parted, leaving them both panting for breath. The mare could barely stand up, and leered at his still erect cock.

"I might not be able to walk through another round..." Her horn glowed. "Let's take this to my bedroom!"

Spike rolled his eyes. "This is going to be a long winter!" With that final word the two disappeared in a purple flash.

******

Part 2: StarlightXTwilight

Weeks passed and the castle was no longer quiet. The storm was still going and the snow was piling high. It was the kind of weather that most would prefer staying inside and snuggling by the fire. Twilight would have loved to read a good book in silence on a day like this. But the moans wouldn't stop.

"Spike, oh yes!! Harder!!"

The alicorn rolled her eyes and tried to ignore it. It obviously hadn't taken too long to find out about Starlight and Spike's little activities. They weren't very good at keeping it under wraps. Twilight didn't mind at first. It gave her more free time. Heck, it gave Rarity more alone time with that disgusting buffoon, Thunderlane. But it was getting very tiresome extremely fast. All the friends quickly found out purely from walking near the castle. Starlight had no subtly on who was plowing her and where.

Twilight was sitting in the living room, sipping some hot chocolate as she tried to focus on her reading. Her body was shivering slightly, even with a heavy coat and a warm fire. No, the cold wasn't getting to her, nor was the lack of sleep. Her ears were twitching as the moaning reached a near peak.

"Yes, cum all over me!!" Starlight screams were only muffed by Spike's draconic roars. Twilight's horn flared with anger and disappointment, and her book was tossed to the side. The castle walls were not meant to keep out this level of sound. "What did I do to deserve this?!" Twilight sighed in annoyance and buried her head in her hands.

Suddenly a purple flash landed on the table. The alicorn shivered at the deep breaths but dared not to peak until she was sure there was only one of them. "Hello?" She nervously asked.

"Twilight." Starlight stammered, covering herself with the tablecloth. "I must have miscalculated the teleporting spell again."

"No kidding!" The alicorn was still trying not to look.

"It was Spike's fault. He is a real beast!" The mare laid back. "Still pumping off to a few nudes I stole from Rarity! The only time I get some freedom is when he is jerking it off!"

"I don't want to hear that, Starlight. He's my brother!!" Twilight threw out her hands before blushing at the exposed cleavage and ass barely being hidden under the cloth. "And you should cover yourself better!"

"What? Don't like what you see?" Starlight teased, sticking her tongue out. "Or would you prefer the view a bit more..." She dropped the cloth lowering, revealing more of her naked and sweating body.

"Get your tits out of my face!!" Twilight roared, slamming her feet on the table. This threw Starlight off and into Twilight's arms. Both mares blushed at the position they were in. Starlight was laying her naked self on top of the clothed alicorn.

Twilight tried to push her off but quickly noted a few things. First off, despite the sweat, the multiple rounds, and the fact she blatantly asked to be covered just a few seconds ago, Starlight was remarkably clean. The second thing she noticed was the mare's body. Her breast was larger and softer, the ass was nice and firm, rubbing against her crotch. The alicorn shivered and groaned, not expecting a sensation like this.

Starlight didn't hesitate to use this moment. She leaned forward and kissed the princess right on the lips. Twilight was in shock, unable to resist. The mare's soft lips pressed against her and the warmth was so inviting. Her mind was melting at the touch. She had to force herself away with all her might.

"What was that for?!" Twilight growled, sitting the mare up and over her lap.

"Sorry, so much dragon... I was beginning to miss the taste of pony!" Starlight was breathing hard and her body was heating up again. "To feel a stallion's long and perfectly round cock." She ground her hips down, knowing exactly what she was feeling under the dress. "So big and ready for action."

Twilight groaned. "You really are a slut, aren't you!"

Starlight giggled and moved her face close to Twilight's. "Aren't you curious too? You want to know what has Spike so addicted, don't you?" She stuck out her tongue and licked the princess's cheek. "I'm a drug that won't stop. One taste and you'll be hooked forever. You want to feel me, don't you?"

Twilight was a mix of horror, disgust, and undeniable lust. Hearing them plow was so annoying, but she couldn't deny how hard it left her. The work was from her own brother no less, but she could stop being jealous of the fun he was having with this mare. Starlight was living in the castle rent-free and constantly tempting both of them.

The alicorn was royalty and the leader of the main six. She couldn't let herself be led astray, even by a temptress as great as her. But it was so difficult not to, especially hearing the lust she gave Spike all winter. Her heart was racing and her body was heating up. Her thoughts drifted off to the idea of her and Starlight alone in her bed.

Starlight could read her like an open book. Her body was so tense and she was clearly holding back. The mare grinned and slowly lowered herself down the body. Twilight watched in both anticipation and horror. Wanted her to stop, but too lusted to throw her off. The mare dropped down onto the floor, kneeling between her legs.

"Just let go, Twilight. We're all alone. Spike is going to be jerking off for hours." Starlight pulled her skirt up and rubbed her thighs. She smirked upon quickly finding the bulge in her panties. "And you haven't relieved this monster in a while, haven't you?"

"The other princesses say I should wait until marriage..." Twilight tried to hold her breath, but the mare was relentless. Her hands were so warm and gentle, massaging her thighs and slowly working their way around the ball sack. Starlight giggled, watching the tent grow with every inch she touched.

"What about a mistress?" Starlight whispered into her ear. "I could be that for you..." She puck her fingers under the binding. "I could help both Spike and you with all your needs. I could make your lives so much better, all you have to do is ask."

Twilight bit her lip and tried to ignore her, but it was hard not to. Starlight's warm breath on her crotch was so intense. The way her fingers were touching her balls. Her own cock was fighting to break free of its cage. She had to drive down the urge to give in. She was a princess. She was royalty. She couldn't let a lowly whore like her get to her.

Spike had clearly ruined all this mare's holes multiple times. Yet, she was still so willing to please Twilight too. It was as if Starlight had no limits or shame. Her body was already tainted by Spike's cock. So, why shouldn't Twilight join in on the fun? Her brother loved it, and so would she.

Starlight could see her resolve wavering. She had the alicorn hook and line. She slowly tugged the panties down and revealed the long horse cock. "So do you want me, Twilight--" She was stopped as Twilight slammed her mouth over it. The mare yelped in surprise but grinned widely at the victory.

"No, this is wrong! So very wrong!!" Twilight screamed through her lustful shuttering. She tried to resist the temptation but it was too late. Her heart and mind were telling her no, but her body wanted Starlight more than anything. "I am an alicorn, you are a mare!! This is so bad, but... Oh, Celestia!!"

Starlight was surprised at how easily the princess crumbled. The moment her mouth touched her cock, Twilight was a mess. Her hands were rubbing the ball sack more as she dragged her tongue up the length. She could feel the shaft pulse with every touch.

Twilight's head fell back and a moan escaped. "No, I must not... crave her."

"But you can't resist, can you, Twilight?" Starlight licked the tip and was hit with the taste of the alicorn. It was so sweet and strong. Her eyes lit up as she began to suckle the top, tasting the salty precum. Wrapping her large breasts around the base, she started pumping up and down.

Twilight moaned louder, her body growing hotter. It felt so good and the warmth was spreading over her body. Her wings stretched out and her horn was glowing brightly. "Damn it, stop! Your mouth is too amazing, Starlight!"

Starlight smiled, dragging her tongue over the slit, digging in. She sucked harder and massaged her breasts on the bottom. Twilight moaned out, her body tensing. Starlight didn't stop and kept licking the head, tasting the alicorn's cum. Throwing her ass back, she pressed her pussy against the table leg.

The princess couldn't handle it any longer. Grabbing Starlight's horn, she thrust her entire cock deep into her throat. The unicorn mare moaned in return, and her eyes rolled back. She could feel the long length go down her gullet. The pressure against the table was great too. Twilight groaned and pushed her head forward. Starlight's throat was so much warmer and tighter than her mouth.

Starlight grabbed the princess's hips and slammed her head down. The two worked together, as Twilight slowly stood off the couch. Despite the incredible cold outside she was now on fire. Opening her shirt and letting her breasts swing out. Able to breathe again, she began to pant and moan her loudest, giving in completely to the desire. She had no clue what came over her. It was as if she lost all control and had no care in the world.

"Starlight... I need this!" Twilight screamed, slamming her head back and forth. Her eyes were closed and she could only focus on the pleasure. The mare's throat was almost like a pussy. And it had been so long since the alicorn had felt such lust. She needed more, and her body wasn't going to rest until she had the mare's insides painted white.

Starlight could feel it, the alicorn was ready to blow. With a quick teleport, her position changed. Now the unicorn was right under the ball sack. Finding the pussy, she struck her horn inward, bit her teeth around the sack, and slapped her breasts hard around the shaft.

Twilight opened her eyes and gasped. Her spine arched and her pussy climaxed in the same motion as her cock. Flooding mare juices over Starlight's horn while peppering white seed over her breasts, stomach, and legs. Twilight couldn't breathe, the pleasure was too much. The room was spinning and the colors were mixing. She felt so weak and tired, but the high was far too much for her to want it to end. The only thing stopped her from falling was Starlight's horn still in her pussy.

Slowly she calmed down and the orgasm ended. Panting hard, she slowly removed Starlight and fell over the arm of the couch. Twilight lay there, trying to catch her breath and get her senses back. The unicorn crawled out and licked her lips. She rolled over the table and spit up, her body covered in another load of semen.

"See Twilight, I knew you would taste wonderful." Starlight giggled, wiping her face off. "Twilight..." She leered over to the alicorn mare and noticed her breathing had deepened and her cock straightening back up. Starlight's jaw dropped and the look of utter malice on Twlight's face. "Okay... looks like I might have overstepped with you--"

"No..." A wicked voice echoed from Twilight's mouth as she gripped Starlight's ass. She held her down and stood up, slowly grinning into utter laughter. "You're mine now, bitch!"

"Oh, shit!!" Starlight screamed as her ass cheeks were spread. The giant horsecock was slammed into her anus before she could escape. "Fuck!!" Her mouth was wide at the impact. It took a single push to mount the entire length inside her tunnel. Her body was shaken with the force and she nearly came from the sudden attack.

Twilight groaned in pleasure, her hips bucking and her tail flicking. "Yes, fuck yes!! Your ass is mine!!" The alicorn roared and started hammering away, her body moving rhythmically. Her large breasts jiggled and her balls swayed as she removed the rest of her clothing. Starlight's body bounced with every stride as the alicorn got into movement.

"Twilight... please..." Starlight tried to protest, but the alicorn yanked her up by the mane. The mare moaned louder and Twilight wrapped her neck with her arm. She squeezed it tight and held her in place.

"Take it, bitch!! Take my cock!!" Twilight's thrusts were stronger, her grip was rougher and her aim was dead on. It was as if the alicorn was in a trance and had lost all restraint. Every thrust was harder than the last and the grip on her mane was unbreakable.

Starlight moaned in pleasure, her ass getting destroyed. She didn't think it was possible, but Twilight felt so damn great. Maybe it was her longing for a horse cock after so much dragon jizz? Or could it be that this was just as good, if not better Spike's own anal beatings into her. No matter what the reason was, she couldn't lie. This was worth tempting Twilight to come out and play.

Twilight growled, feeling the tightness around her cock. She leaned forward and whispered into her ear. "Is this what you wanted, slut? Is my horse cock buried in your ass? Well, you got it, and you are never getting rid of it!"

"Please... please..." Starlight begged and moaned louder. "Fuck me!!"

"With pleasure!" Twilight smirked, pounding her harder and faster. The sound of flesh on flesh was deafening and the table shook and scraped. Leaning back, she spanked the unicorn's ass while fucking it. "This ass is mine! It's not for my brother's, but only for me. Understand?!"

"Yes!!" Starlight was drooling and her eyes were rolled back.

"Say it!!"

"I'm your ass slut, Twilight! Use me, please!" Starlight begged and pleaded.

Twilight didn't need any more encouragement. She was so close and the mare's ass was squeezing down on her. It was too much. Pushing the unicorn down against the table, she pumped direct and hard. Her balls were slapping and she was holding the mare's waist. "Not yet..." Twilight moaned. "Not yet...!"

Starlight couldn't hear her. Her mind had broken a while ago. She was panting and gasping, her entire body shaking with the impact. It was like a bomb was about to go off, and her ass would the crater. She needed it. She needed Twilight to finish and she wanted her cum. "Do it, Twilight! Please! Fuck me!! Cum!!"

"Damn it!!" Twilight cursed and pulled out of her and blasted white seed all over the room. Starlight screamed, her mind gone in the flood of pleasure. Her entire body was shaking and her vision was a blur. She couldn't stop the orgasm, and her whole world was melting. The unicorn simply lay there and enjoyed the hot semen raining over her.

Twilight fell onto the couch and rubbed as much as she could onto her breasts and face. It had been far too long since she had a climax that powerful. "Sunset Shimmer... I think you've been replaced."

"Who's that?!" Starlight rattled around in the white slick, falling off the table only to find more on the floor.

"Just a nobody now..." Twilight grinned and looked down. Her cock slowly shrunk with the last few drops. Despite this, Starlight crawled up and over her, cuddling with the alicorn. With both of them fading in consciousness the room turned black.

******

Part 3: SpikeXStarlightXTwilight 1

The next week, Starlight awoke in her bed. Her body is so energized from all the fucking. She had never felt better in her entire life. Her eyes drifted to the window. The snowstorm was surprisingly still going. Strange, she thought for sure winter would be calming down by now. "I might have miscalculated something--" She was silenced upon seeing Spike and Twilight both standing in her room. They were both stark naked, with their cocks on full display, but neither were looking at her. Instead, the siblings were enraged by each other's sights.

"Twilight!" The dragon growled at her. "It's my turn to fuck her!"

"Spike!" The alicorn tried to keep a straight face. "I believe it's actually my turn."

"Guys, guys, let's not fight." Starlight stepped between the two, trying to calm them down. However, they braced her against the bed and ripped off her blanket. Both continued to look at each other with rage and malice as their members grew to full stride upon her naked body. Starlight's eyes lit up, her mouth watering at the sight.

"I fucked her first, I deserve more right over her!" Spike demanded, groping one breast.

"She wasn't some virgin you just popped!" Twilight followed, taking the other breast.

Starlight fell back at their intense touch. Their hands were so rough, yet warm. Her nipples already hardening between their fingers. "I'm certain, we can figure something out..." Her legs squirmed underneath them.

"You can have her after me," Spike ordered, spreading the mare's left leg.

"No, you can have her after I'm done!" Twilight spread her right leg.

Starlight was panting hard and her head was rolling back. Their cocks were so close to her body that she could feel all the heat panting inside them. It was too much, and the unicorn was losing her mind. "Yes, do it, please!!" She begged for one of them to make a move, but both were too busy arguing over her.

"You already had her!"

"And you're not my boss, Spike!"

Starlight and winced with her lust and just took both cocks in her hands. "Please, just share me then!!"

"No, we're not giving into incest!!" They both screamed at her in unison.

Starlight groaned and fell back onto the bed. Her hands tried to work their cocks, but they kept refusing her advances. It was too much, she couldn't stand this fighting. But it was also so damn hot at the same time. She was their toy and they couldn't decide on who should play with her first.

"She is mine!!" Twilight pushed forward, slapping her cock at Starlight's breasts. The tip touched Spike's hand, making his grip fade.

"No, she's mine!" He pushed into the breasts too with his cock. Both of their members hit each other, making their groan from the pent up energy.

Starlight could tell it was time for drastic action. She took both cocks and slapped them against each other. Making the two gasp in return. "You two are driving me crazy!" The mare squeezed their tips and hit them harder. "Just have a cock fight already. The last one to cum gets to go first!"

Feeling their desires getting too, the two finally conceded. Starlight smiled and leaned forward, licking the tips before slapping them together again. Twilight and Spike glared at each other as the unicorn began to stroke them. Both clapped back, hitting their members hard against each other.

"You won't win, Twilight!" Spike threatened, thrusting his cock into her strokes.

"We'll see about that, Spike!!" Twilight did the same and Starlight moaned in return.

The unicorn continued to pump them faster, her fingers running up their lengths. Their pre-cum mixing as their tips hit each other. The mare was growing so wet at the sight. "Come on, give it to me." She moaned, opening her mouth. They didn't need much encouragement, just insurance that the other would lose this bout. Their hips were pumping and their balls were swaying.

"Oh, you are going down, Spike!!" Twilight moaned and leaned forward, pushing the dragon's cock to the side. She slapped the head over Starlight's mouth.

"Don't count on it, sister!!" He countered, smacking his cock on the other side of her mouth. Both were trying to enter, and Starlight opened wide. Her tongue licked them and her hands stroked fast. Their moans grew louder and their members were heating up. The mare was losing herself in the desire.

"You won't win this, Spike!!" Twilight moaned, thrusting her hips faster. Her cock was pulsating with energy, but she couldn't let her brother win. She needed to get back at him for the last time. The alicorn grabbed both of her breasts and wrapped them around her member.

"You're not even close to beating me, Twilight!!" Spike's own shaft was throbbing with lust. He could feel his body tensing up. Seeing his sister's action, he took Starlight's mane and yanked her mouth down over his too.

Starlight's hands dropped as her plan worked. With their lust out of control, they just went at it, fucking her chest and mouth with no regard for the other's work. The unicorn could taste the sweet nectar of their tips over her body. Her ears could hear their moaning reach a peak. She knew it wouldn't take long, but their bodies were working overtime to beat each other.

"Twilight, you are not winning!!"

"Spike, this is my victory!!"

Starlight could feel them about to blow, and their tips were swelling up. She pulled herself off of them and went back to rubbing them off. Both of them were so close and their balls were bouncing. Starlight couldn't believe how lucky she was to have a dragon and an alicorn wanted her. Tossing her tongue out, the mare gave both tips a nice kiss. "Go ahead and cum. You earned it."

"Take it, you bitch!!"

"Eat it, slut!!"

Their moans rang out in harmony as their cocks blew up at the same time. Both shoot large ropes of white seed at the unicorn. Her eyes rolled back as the hot seed blasted over her. Covering her from her head to her breasts and knees. The two kept blasting her until the mare was soaked in their juices. Starlight licked her lips and swallowed a little bit.

Spike and Twilight panted hard, their climaxes were far more draining than expected. Their members slowly softened and the cold air froze the sweat over their bodies. Both of them fell onto Starlight's bed. The mare giggled at the sight, slowly crawling above them.

"I guess that's a draw." She moaned, slowly grinding her legs over their spent cocks. "You two will have to share me..." Her laughter slowly echoed through the room and outward throughout the whole castle and beyond.

Thunderlane, slowly freezing to death outside in the storm shivered in both horror and cold. His hot and hard erection was the only thing keeping him warm while listening to all their disgusting noises. It was kind of worth it in the end for him... even if he prompted falling dead afterward.

******

Author's Note

No, it's not over yet. One final chapter coming next Monday. I'm serious, the last one.

Yes, I had to kill Thunderlane somewhere.

Part 4: SpikeXStarlightXTwilight 2

Spike and Twilight both looked at each other, their bodies still shaking from another blow and boobjob. Three mornings ago, Starlight declared they should share her. Yet this was as far as they could go with the other in the room. Both felt so uncomfortable going full fuck on her while sibling watched or even worse, while the other attempted a hole of their own.

Starlight stared back up at them, waiting avidly for things to go next level. She didn't the cum baths but craved their penetrations. She wanted both inside her. She needed to know how it would feel for both to rip her holes wide open.

"Um, Twilight, Spike..." Starlight blushed, slowly sitting up. Her fingers tracing over the cocks again. "Are we ever going to do the big event?"

"What are you talking about?" The two asked.

"You know, all three of us at once?"

Twilight and Spike shared a quick look before turning to the unicorn with intense blushes. "Starlight, are you crazy? We can't do that. It's forbidden."

"You two are not blood related, so what's the problem?" She kissed each tip to full attention.

"Starlight, you don't get it." Twilight pulled free. "Spike and I are still siblings."

"Yes, this is a taboo act for a reason." Spike the same, both of them refusing to look at each other.

Starlight giggled and crawled up, wrapping her arms around their necks. "I'm not asking you to fuck each other..." She turned back around and stole a deep kiss from one of them. "I simply want you to fuck me..." Switching to the other's lips with as much lust. "And beat my holes so damn good."

Twilight and Spike were frozen. Each of them was lost in her eyes, her words were sinking into their brains. This wasn't the same as fucking in secret and then fighting for dominance over her. If they were to agree to this, they would be entering new territory. A place where their bond would never be the same again.

"Are you really serious?" Spike asked.

"If you agree, there's no turning back." Twilight stated.

"Just let it happen!!" Starlight rolled her eyes at their lack of resolve. Grabbing Twilight, she pushed her onto the bed.

Starlight shivered back and over Twilight. Wrapping her arms around her, the unicorn took Twilight's mouth and started making out with her. Spike's jaw dropped, feeling left out until her foot tugged on his cock too. Twilight was taken back by this second kiss, but returned it in a heartbeat. Their tongues danced and their breaths mixed.

The mare was so hot and the passion was undeniable. The alicorn couldn't stop, the desire was too great. Her cock was raging again, even with her brother standing in the same room. Her hips were grinding against Starlight's crotch, trying to gain entry into her. The unicorn moaned and lifted her hips up, offering the pussy up for the alicorn.

The moment she got the opportunity, Starlight slammed the alicorn's cock right into her pussy. Twilight groaned with joy and her body shook. the unicorn was so tight, even with Spike's constant plowing. It left Twilight wanting more and she was not going to hesitate. The princess's legs lifted off the ground and her wings spread, getting a better leverage. She wrapped her arms around the mare's back, squeezing her shoulders and bringing back the kiss.

Spike couldn't believe what was happening. His sister, one of the main six, a pillar of Equestria royalty was plowing his lover, the ex-villain of Starlight Glimmer. She was his, and his alone... right? The dragon was not going to allow her to leave him, nor would he share her. He ran over and dug his claws into Starlight's hips.

The unicorn mare quivered with utter delight. A wicked smile curved over her face as she spread her ass cheeks for him. Spike wasted no time and shoved his large draconic cock deep into her anus. The mare screamed with pleasure and her eyes rolled back. Twilight gasped and felt her cock be pressed aside. It was even tighter inside Starlight now.

Starlight's planned worked perfectly. She was now in the center of two horny creatures, and the feeling was amazing. Both of them started to fuck her, slamming their bodies in perfect sync. Twilight was just as strong and fierce, her cock was pulsing and her hips were smacking hard. Spike was so wild and powerful, his balls were swinging as his claws digging into her. Starlight was trapped between them and loving every second. She felt like the world was spinning and the only thing she could focus on was the pleasure.

The two members fucked in and out at incredible speed. Slowly pushing more of themselves inside her with each thrust. Their grunts were animalistic like this was always the norm for them. Starlight was a mess, her mind was melting and her body was on fire. She couldn't speak and her tongue was sticking out. All she could do was scream and moan at the pleasure.

Twilight didn't understand what was coming over her. She couldn't think straight and she didn't care. Her entire being was focused on the pleasure and her body was begging for more. She couldn't stop herself even with her brother plunging into the same mare. The princess just didn't care, she was lost and the only thing that mattered was the sex.

Spike was a little different. Throughout the weeks, Starlight had fully broken him down into nothing more then her fuck toy. He was heart broken when he found her satisfying his own sister, but couldn't deny the pull her lust had over him. Even with the betrayal, he still desired her and couldn't deny his needs for her body.

"Fuck me, harder!! Rip me in two!!" Starlight begged, shoving the alicorn's head into her breasts while leaning over to make out with Spike once again. Her body was quivering and churned their members for all their worth. Spike's draconic tongue went down her throat. Twilight took a big bite of her nipples and sucked hard. The unicorn could barely handle it. Her holes were squeezing them so hard.

"Twilight, Spike, please!!"

They fucked faster, their members swelling up with desire. Both of them were panting and moaning. Their hips were a blur on the bed and their hearts were racing. The heat was rising and their minds were going numb. They couldn't fight this anymore. Starlight had finally brought them together and now it was time for her prize.

"Cum in me, cum in me!!" She demanded, her pussy clamping down on Twilight and her ass squeezing Spike. They couldn't stop, the need was too great. Their balls were churning and the pressure was building.

"Starlight, no..." They both groan in unison.

"Fuck me, breed me, make me yours!"

It was too much, they couldn't handle it. Their bodies were on fire and their members were swelling to the breaking point. With a final thrust, both Twilight and Spike blew. Their hot seed filled up the mare's womb and stomach. She moaned, and her body spazzed. Her holes squeezing tight as their cum splashed against her walls.

Twilight and Spike were in a mix of horror and absolute delight. Their cocks were still spewing, and their heads were dizzy. Their bodies were shivering with disgust, but they didn't want to stop. The sensation of their tips brushing against each other as each one popped out of her holes was beyond words. They tried to fight it, but Starlight had truly done the impossible and shattered their bonds.

They thrusted again, at each other, spitting tiny bits of cum on the other's cocks. They didn't stop and kept going at a fever pitch. Pushing their cocks deep and brushing their tips together again.

"It feel so good, Spike!!" The alicorn affirmed

"Twilight, I need more." The dragon agreed.

They stood up over the bed, dragging the laughing unicorn with them. Flipping her around and wrapping her arms around Spike's stronger shoulders. Twilight lined Starlight's body above their cocks and dropped her down. Starlight screamed and changed positions. Spike beating into her pussy and Twilight taking her anus.

The mare's eyes rolled back, and her tongue fell out. This was all she ever wanted. To be sandwiched between two who could give her all the sex she craved. Spike and Twilight were not even thinking at this point. Thrusting her back and forth in the air, their cocks rubbing into each other's seeds. They couldn't stop, not even when her juices splashed on their legs.

The alicorn and dragon were not holding anything back. Hitting upward with enough force to break a normal mare. But Starlight was not a normal cunt. She had trained her body over the years. Building herself to handle the most powerful of beings and the roughest of lovers. The two were giving her the fuck of a lifetime and she wouldn't stop them.

No, she wanted more and more. Her holes were milking them, pulling their cocks deeper inside. She was lost and couldn't believe what was happening. It was almost like a dream. Their tips were beating and her holes were sucking. Their cocks were pumping so fast and the heat was rising again. While the snowstorm raged without any sign of ending, the room felt like a spa.

Starlight wrapped her arms around both of them, flipping to each mouth with every thrust and taking them both at once. Her juices soaked their balls and her hips was gripping their bases. This was the most intense and erotic thing she had ever felt. Her heart was pounding, and her mind was melting. She didn't want to let go, not even for a second.

Twilight and Spike couldn't think, and they didn't want to. The feeling was incredible and they didn't want to lose the moment. They could feel the unicorn's body shiver with every thrust. Her holes were tightening, and her breath was growing shorter. Both knew what was coming, but their cocks were too sensitive and three nights trading her mouth.

Finally the string was cut, and they didn't care anymore about the other being in the room, sharing the same mare. Twilight and Spike fucked her with even greater intensity. Starlight couldn't scream anymore, her voice was lost. Her body was shaking and her eyes were closed. There was only the sound of slapping skin and the sweet aroma of their sweat.

Starlight was at her peak, her climax was ready again, and her body was tensing up. Yet they would relent, they beat her holes for all their worth and her body could only handle so much. The dragon and the princess were too far gone and their cocks were swollen and heated.

"Spike, Twilight!!" The unicorn pleaded in a whisper. Her holes clamping down hard and her juices were flowing freely. They didn't say a single word in return. Their groans were too strong. Her body was shaking and her toes were curling. She could feel it, their members were reaching the limit. Her pussy was so tight and her ass gripped. It was all too much, the unicorn pulled both of their mouths over her lips at the same time.

With a final thrust, both Spike and Twilight's cocks exploded. Their tips firing rope after rope of thick cum deep into her holes. Their seeds mixed with the previous siblings' loads like incestuous buckets inside Starlight. Starlight could feel their hot seeds splashing into her walls. Their bodies were shaking and her eyes were wide open. The sensation was beyond her wildest dreams. Her mind was melting and her body was quivering.

Twilight and Spike had to fight for the air, their climaxes were too strong, and their heads were dizzy. The heat was unbearable, but her grip was even stronger. They couldn't escape her body. Starlight's pussy and ass was still sucking, begging for more of their delicious cocks. Their seeds were dripping down and coating their bases.

After a solid ten minutes passed, the dragon and the alicorn were finally able to breathe properly. They pulled out of her and dropped her like a wasted sex toy. Starlight fell to the ground, her mouth full of saliva, her holes twitching and leaking with their incestuous seeds. Her mind was mush, and her heart was pounding. She couldn't believe what had happened but knew it was far from over. Seeing their erections still casting shadows over, she rolled around and spread her legs again.

"More, please... more." She begged in a daze.

Twilight and Spike looked at each other with the same wicked smiles. They couldn't fight it anymore, their bonds were severed, and their cocks were still stiff. Leaning own, they joined her on the floor. It didn't matter at this point which hole they took. Heck, they could even share a few holes at the same time. The snowstorm raged, the winds blowing and the temperatures dropping. None of this was a problem for the trio, their bodies were burning with sexual desire and the only way to keep warm was to fuck the night away.

Starlight cried out and her entire body tensed with multiple orgasms. Their ball sacks were clashing against each other with each fuck as if they were fighting over who would fill her first. The two ponies didn't say anything, their minds too focused on the sex. She leered at their scrunching faces and their grunts, knowing that her plan had truly succeeded. Spike and Twilight were no longer siblings, but two whores willing to commit to her every desire. And there was so much she wanted to try out.

Truthfully this was never some random thirst of the moment. She had been planning this since she first arrived at the Castle of friendship. The alicorn and dragon thought she had truly reformed and wished to be a better pony. That was all a lie. She came here to twist them under her command. She couldn't convince them in the village with her intellect, so trapped in this place surrounded by a snowstorm of her own making she would win them over with her body.

And the results were exactly what she expected. Both of them were far too horny and pent up from their years of sexual frustration living together. The presence of a hot and sexy mare like her was the break in the dam. Now the two were truly addicted to her power. They were her sex slaves and once the storm was ending she would conquer this pitiful town of Ponyville and soon all of Equestria!!

So declared with the final gasps of her latest orgasm. Twilight and Spike gave their final thrusts of utter defeat, filling both her holes to the brim. Starlight threw her head back and screamed one final time as her stomach expanded with the loads of semen. She had won, the princess and dragon were under her command, and they were the first of many. Her victory was only silenced as they pulled out of her and painted her body white.

******