It was a cool evening as the two walked to the diamond mines. Rarity wanted to get some final diamonds before she left the city for business. They needed to attend a royal party as soon as they left town so she was already in a fancy bold red low back dress. Spike walked closely behind her, in his finest suit... and a kitchen apron. Rarity spent hours on that suit, so she didn't want any dirt on it.

"Do you think we have time?" Spike questioned as the caves came into sight. "The diamond dogs usually wake near this hour too."

"Don't worry, I have a strong and strapping good dragon by my side." She leaned over, inadvertently shaking her chest over him.

Despite the years passing Spike never got that tall. Always standing just clean under her chest in height. Here he was thirty-five years old and shorter than even the CMC. This height difference annoyed him greatly as Rarity adored taller stallions. What could she possibly find appealing in him?

"Why are we going to this party again?" Spike moped as he reached the site. "I mean, you're just going to talk to a bunch of stallions all night."

"Clients, Spike. They are clients. This party will be the peak of my business ventures!!" She laughed while handing him the pickaxe. "Please be careful."

"Yeah, yeah. I will." Spike took grip and went to strike. He didn't want to make it known but these recent business ventures had been tiresome on him, especially recently. He often found himself getting strangely more sweaty and drunk at the parties, only getting thrown out before Rarity would notice. He huffed at the thought, maybe she didn't care how much she was pushing him.

Unbeknownst to him, Rarity was watching carefully. She didn't want it to slip but she had become quite shy around him recently. A strange smell around him had been driving her crazy. She didn't know anything about dragon biology. These parties were her chance to make a move on him. However, every chance she got he went missing. This time it would be different, she thought. Once this party was over, she was just going to take him. In the hotel room, in the backroom, heck, in the closet. She didn't care where. She even chose to go extra prepared... She wasn't wearing a bra or panties under her dress. And she had taken some very special pills from Fluttershy’s secret stash.

"Hey, I think I got something!" Spike's voice hitched as a large chunk broke free. The shine was incredible and Rarity's eyes glowed with joy.

"Oh, oh. I want that!! Break it into pieces." She presented the basket. Spike took another strike, shattering it and sending pieces flying in all directions. Rarity didn’t want to pulse any magic out in case it attracted those viscous diamond dogs. So she rushed around to catch what she could as they flew through the air.

Spike was shocked by that final strike. Not only had he been getting sweatier and drunker lately, but also his strength had been getting greater. It was a surprise, to say the least, but also confusing. He hadn’t been able to get information about this from Ember or Smolder in the possible assumption that this might be dragon growth related as he was too busy lately attending these parties. As he watched Rarity run around, shaking her chest and rear while catching as many as she could, he told himself, "This will be my last party... I'm sorry Rarity--" He stopped at her screech.

"Help?!" She screamed in fear and confusion as the sand sank beneath her. It was moving so fast that within seconds her legs and arms were already taken in.

"Rarity!" Spike rushed over and dug around the sand. "Reach out to me!"

"I can not. My hands are stuck!" Rarity found her body going wild under the sand. Fear was quickly being replaced as the sand reached through her dress and gripped tightly to her naked body. It was such a strangely tight feeling, akin to a stallion on top of her. She found herself breathing harder and sweating more.

Spike hadn't noticed any of this as his mind raced for options of rescue. A slight annoyance in the back of his head popped by as he realized she was probably still holding onto the basket and that was why her hands were stuck. "Here, grab this stick."

"Oh, thank goodness, you brought such a large and thick-- wait, this is just a normal stick!" Rarity practically barked at him.

"Obviously, what did you think I would use?!"

"... Nevermind," She mentally slapped herself. Just why would she go to that angle? Such a whorish answer at a time like this, just where was her mind going? Her eyes widened as the stick dropped right between her breasts. "Oh... Lower, Spike!"

"If I go any lower, I'll be sucked in too!" he panicked.

"Oh yes, suck it good." Her mouth slammed on the stick as he shook back and forth. She couldn’t stop herself from licking it carefully. Was it the effects of those pills? She mentally screamed at herself to stop.

Spike's jaw dropped in shock. He was completely lost to her actions. Was this sand making her so scared that she was going feral? Spike winced as the sand sank deeper. "If I get stuck then we will both be trapped."

"Yes, it's all been a trap." She bit down on the stick and struggled more. This movement knocked a bottle out of the sand. Apparently, it was hidden in her cleavage.

It was at this moment things became somewhat clear to Spike. It was a bottle of aphrodisiac pills. Freaking sex pills, just why would she have taken that before the party? She was planning to leave him behind and go find a stallion later!! "Rarity... I don't think sucking on wood is healthy," he realized just what she was doing. Though it was quite hot, he also couldn't help being jealous.

"Then give me some real wood, damn it!!" She screamed erratically at him.

"Trust me, this is as real as wood can possibly get..." He tried calming himself.

"Well, I've had stallions with worse wood, to be honest." Spike's eyes widened at that answer.

"Wait, there have been other stallions? Was their wood not long enough?!" Spike was shocked again. This time by his own answer. Sure he was always jealous of her dates but comments like this were completely wrong right now!

"And here I thought I was the only one thinking dirty," Rarity was in total ecstasy. Seeing Spike's ripe wood moving back and forth trying to save her. "Oh, this is making me so thirsty."

"I have a bottle of milk in my pocket," Spike mentally slapped himself again. Just where were these comments coming from? Now he was getting angry at himself and her for encouraging him.

"Quit torturing me, please!"

"What? Torture you?!" Spike was at a loss for words.

"Yes, yes damn it!!" She struggled more. "Always leaving me without warning. Constantly standing by me without really trying!"

"Trying?! I'm trying to save your life!!" Spike screamed, rage tipping him over.

"Just pull it out already!!"

A zipper sound spooked both of them. Spike's eyes dropped down and flew back in total shock and fear as his pants had broken open. His underpants were completely exposed to the world. Even worse, he was engorged.

"How long have I been... erect?" Spike dropped the stick leaving Rarity just as tired and clearly soaked from head to...

"Wow, you're... so... ready--" she stopped at a gurgling sound. "Spikey! I think I'm sinking in more!!"

"Oh, no! What should I do?!" He screamed in terror.

"You're going to have to pull me out!"

"Reach in!" His eyes froze at her as the only exposed part of her was her head and her cleavage.

"Spikey!" Rarity screamed out louder.

"Hold on, Rarity!" He grabbed her by the head and pulled.

"No, you'll rip my head off!!"

"Then where?" He carefully reached over her mane.

"Don't you dare ruin my hair! It took hours to get this perfect!!"

"Then where?!" Spike argued back. Rarity was thrown back by his sudden rage. "The only other exposed part of you is..." His words drifted, making Rarity remember the obvious. Her plump cleavage was bouncing around in Spike’s sight.

Rarity’s eyes raced back up to Spike’s. His green gems stared deeply into her white pearls. "Oh... Oh my, Spike--" She was stopped as Spike reached in and pressed his hands over her breast. "Oh..." she cooed involuntarily. "No... this is not--" She hitched in hidden delight as his fingers traced over her nipples.

Spike tried his best to push away his thoughts as he felt the supple flesh of Rarity's breasts pressing into his hands. He fought the temptation to squeeze the firm buds of her nipples like hot little exclamation marks. However, he couldn't help but explore momentarily before he got back to business.

Rarity defiantly fought her urges at first, and she kept her coos hidden. She didn’t realize Spike was this good. No stallion had been this soft and tender in such movements. Her body shivered evermore as he reached deeper in.

Spike felt past her breast and over her ribs. He did his best to ignore the soft giggles she gave as he inadvertently tickled her. Finding the right spot he gripped firmly, yanking, tugging, and pulling with as much might as he could muster. The sand fought him with every movement, but even he could admit the mare of his dreams was a bit heavier than he expected.

"Sp- Spikey," Rarity mewled, the pressure of his arms pushing her breasts around sending her into even more of a lustful fog. "Hurry!"

Spike swore she was gonna be the end of him. Her constant demands only seemed to fuel his rage even more. It was a strange feeling before he would have given anything to have his hands in the position. How many nights passed as he dreamt of her bouncing orbs? He was always so happy at the sight of them in the distance and envious of any stallion that had their way with them.

Rarity was having the hardest time with herself. She tried so hard to hold back the drool and utter delight from Spike’s movements. She could almost swear his hands were getting bigger. Was he deliberating getting rougher with her? “Oh, Spikey-- ravage them--” She quickly silenced herself. She had never said such a thing to even a stallion while they were in a blind bucking to finish and all Spike was doing was holding her.

His rage was growing by the second and yet he couldn’t deny his enjoyment. This moment was his and his alone, no other stallion would be with her in this way. Even stranger, he was getting a better grip. "I'm trying," he growled deeply trying hard to ignore the sweet smell of her body lapping out of her with each movement, his shaft ever-thickening with each shake.

He smiled, finally getting the perfect grip around her body. He lowered himself to get better leverage, ignoring his face pressing against her cleavage.

“This… is so wrong,” Rarity tried to dignify herself with the scene playing out. Spike’s spiny head now bobbing over her mouth. She could have sworn the spines were getting sharper.

“Okay, here we go--” He gave a soft roar as he tugged her free again.

Rarity cooed as his voice echoed between her cheek and her cleavage. Having his face out of sight she took this moment to just drink in the smell of him that had been driving her body crazy. She grinned at the softer hungry sound vibrating in his throat. "Spike, this is~"

Spike tugged again and again until the force knocked him on his ass. The top half of Rarity broke free and landed full bust exposed onto his swollen underwear. This action burst his shaft free from its dungeon.

Rarity’s eyes bounced back and forth with her breasts as her vision blurred. She saw the stick between her replaced with Spike’s burning throbbing cock. Rarity's horny desires had been achieved much to her concern.

Truthfully, she was quite shocked as the girth was barely enough for her breasts to cover and the length reached perfectly across. The head nudging against her full pouting lips and snout. The scent was so strong, stronger than any stallion, and covered in the sweating he'd been doing.

"Oh Celestia, Spikey, this is... so indecent~" Rarity’s words were stopped as the head slipped in through her wording.

Spike hadn’t even processed what happened before his body gave a soft buck. Rarity’s moans removed any offending thoughts from both of their minds as Spike came back to reality. Spike’s eyes went wide at the sight of it all. Yet they winced closed again at the soft touch of her tongue.

His body gave another little buck, smooshing the head of his cock more into Rarity's mouth. Each movement pressed her tongue against him, making him buck again with more urgency. Rarity’s eyes widened and her mouth twisted with soft squeals as he pushed more.

After a few more Rarity finally broke her mouth free and demanded, “Spikey, this has gone too far--” she spat away from the sharp taste on her tongue.

Spike seemingly didn’t hear her as he gripped her breast tightly with his large hands, making her almost purr with delight.

“No, Spikey, we mustn’t--” She was stopped as his cock bobbed against her face. Spike roared and thrusted harder, his hands gripping tighter and pressing Rarity's breasts together for greater pressure and friction.

“Spikey… please--” Rarity shrieked as the cock seemed to grow in size, dragging through her hair, messing up her perfectly made mane.

"We shouldn't-- we should..." Rarity’s protests changed to desire as her mouth opened one final time and was filled with Spike's cock. She'd specifically told him not to mess up her hair. Oh, how stallions knew that sent her overboard.

Spike growled as something in him shifted. His cock grew with lustful actions, pressing his head against her throat. His body moved on instinct, cock pushing in around Rarity's breast, lips, and tongue and tipping her throat. Rarity's body quaked to accommodate him every time it pushes in.

Her mouth was so hot, wet, wetter than any other stallion ever could make her. Spike lost himself to the sensations, animalistic roars echoed outward, ripping the tip past her throat.

Rarity's fear vanished and excitement raised with confusion. Spike was getting rougher, but the bouncing of her breasts and the feeling of that thick throbbing shaft in her mouth, was sending her close to finishing long before he could penetrate her. She had been craving him for a long time but she never expected it to happen like this. She never expected it to be this good. She hummed with delight as Spike’s cock blurred in her mouth.

Spike stopped motioning her breasts and grabbed her face. His bucking alone was keeping them bouncing as he rocked her head back and forth.

“Rarity… I’m,” His words weren’t enough to fight through his roars as he made one last good thrust. The urge clenched his hips and leg muscles into an upward thrust. More of Rarity’s body broke free with the force of it as a fountain of cum exploded from him, filling her throat before bouncing out and absolutely drenching Rarity’s face.

Spike fell back in exhaustion. However, his attention came upon his back. Turning around revealed his suit had been ripped open by his spines. They were now far larger. In fact, his gut had rescinded and his body had gotten more slender.

He had always been a short dragon to begin with since reaching his adult age several years back, so this was very different. He had gotten much taller than Rarity in only a few moments. His wings were even forcing their way out of his suit.

“Spikey…” Rarity coughed up more cum and shrieked in shock. “I spent three days on that suit,” She pointed out the damage. It wasn’t just the back, his knees and elbows had ripped as well and sharp spines had taken point.

“Wha…” Spike’s words were more like growling with each syllable. “I can’t…” Soon enough Rarity couldn’t understand a single word he was saying and neither could he understand himself.

All of that didn’t matter as a strange smell whipped by Spike’s face. This sense was so incredible, unlike anything he had smelled before. It instantly brought his cock to attention.

His nose jumped around for the source of the smell. Without giving Rarity any word he fell down to all fours and walked around. Spike’s knife-like eyes landed on Rarity's perfectly exposed back and plump ass.

Rarity winced as wearing such a low-cut dress had backfired on her in the worst way possible. She had wanted Spike to only get previews during the party and thrill herself in his watchful eyes. But here he was staring and licking his lips at the reveal of the supple rounded marshmallows.

Rarity could barely fight back, softly moaning and coughing as she struggled in the sand. The mere image of the oncoming events in her head was enough to drive her crazy. She could see his movement and knew just how much all these actions had changed him. She gave a small smile, hoping he was just going to stare at her most exposed body in admirement.

A little wiggle in her hips was all he needed. Spike's instincts took it as an invitation. He stalked carefully over Rarity, a hungry growl in his throat. Stopping behind her he grabbed that perfect ass and spread it open, revealing the furrowed rosey entrance.

Rarity’s eyes went wide. He wasn’t going to just admire?! Her mind raced.

Spike’s toothy jaws dripped strings of drool over her back and down between the thick marshmallows of Rarity's ass. His hands massaged the white puffs carefully with his claws, spreading her even more.

“Oh, Spikey…” She moaned, his breath alone broke her. Her sight went dizzy and she leaned forward expecting him to penetrate her womb. She never expected him to move this fast at all. Spike was so graceful now despite his size, his sharp claws felt like the perfect acupuncture after all that tightness the sand gave her.

"Spike~ take me!!" Rarity's incoherently mewled at the sudden pressing of his cock. She winced harder in fear as the head tore through the wrong entrance.

Rarity was in a mix of panic and pleasure as she tried to wiggle away more, legs still stuck in the sand. Spike gave only a warning growl as her anus opened to his wide size. She continued to try and get away until his hands slapped on each cheek. Tears prickled at the corners of her eyes as she lets out a weak sob.

Spike growls again this time with a kind of satisfied urgency suiting him splitting her ass open. He pushed in deeper, making her twitch evermore. And didn’t stop pushing until more than half his length was inside her.

Rarity sighed in relief not knowing just how more was left outside her. He was far bigger than when he was in her mouth. This size was more than enough for any stallion. Easily the biggest she had, ever.

A harsh thrust of his engorged cock changed her mind completely. She let out a squeal of pain, surprise, and desire. Her body was rocking forward with the motion, cracking the sand below her. Rearing back, he shoves in, again and again, getting deeper and deeper. His hands smacked just as hard against her rear as his cock did.

Rarity squealed more at loving the tightening of her body against him. His previous release and Rarity's saliva helped to slick the way until he was balls deep. Her mind was in a strange twist of pleasure and pain as her organs moved aside to his growing size.

Spike moved his hand over to her arms and pulled her up, unveiling her cum and sand-covered breasts to the air. Shaking her wildly and pulling her back, his cock dove in completely.

Rarity howled and shrieked with delight as her hand fell on the bulge pressing up from her stomach. Arching her in place Spike gripped her hips again, yanking her back as he kept thrusting in as deep as he could.

“Oh, yes Spikey. I… need this…” Rarity’s head dipped back as his thrusts got more frantic. Her hand pressed against the ever-growing bulge on her stomach from his cock destroying everything inside her.

Her eyes closed tightly and her teeth locked in place as she felt something rise up and through her. Spike arched his back and exploded in ecstasy within her. His cum expanded her belly before shooting out her open mouth and spewing upward several feet like a fountain, flowing down her whole body and down his sack like a river. He gave one final ground-shaking roar as his cock launched her out of the sand completely and on the ground.

Rarity gave a gutty laugh of cum and Spike’s cock flailed wildly above her, dousing her completely in more spurts of cum. Her whole body trembled into unconsciousness.

Spike's roar could be heard in all directions, stopping the sand with its shaking. Rarity didn't care though, she was thoroughly finished. She didn't care if he wildly violated her womb at this point, she wouldn't feel it anyway. This was the best sex she had ever had. She simply laughed softly as his giant shaft bounced on her back, slowly shrinking with each second. At the same time, the dragon's body was slowly getting bigger and bigger.

"What is going on here?!" A shrill voice echoed out. The voice was stopped at the sight of it all. The remains of the suit fell away completely. Standing over the mare like she was his treasure was a full-size dragon.

The dragon standing over his mare turned to see the diamond dogs staring in shock. Some of them fully erect from the action early. However, that was not the sight the dragon wanted to see. Fueled by pure dragon rage and dominance he jumped forward and plunged his teeth deep into the biggest dog's throat.

The others lost their erections in an instant and screamed in fear. The dragon pulled back, tearing the head and spine of the dog out and spewing blood all over the others. They could only back away in fright as the dragon ripped off each limb and devoured chunks of flesh.

The medium diamond dog took in a deep breath of bravery and charged forward. The dragon didn't even look, slicing him in half with a single tail swing before throwing his upper body around like a ragdoll and dropping it at the lead diamond dog's feet.

The lead diamond dog just broke down in tears. After everything that happened, from the random quicksand events that had been slowly taking over these caves for months to the strangest of actions happening just outside their cave and now the brutal murder of his brethren. It was horrifying and yet for one brief moment, there was bliss in seeing that mare's naked body displayed beyond his reach. The leader's eyes widened, remembering the mare and the annoyance she brought. Always such a painful memory but one he satisfied himself with every night. He realized this could be his chance. He could hear the dragon still feasting on his kin. All he needed to do was run over, grab her and bolt out of there. His feet followed his thoughts. He could have the mare all to himself to sake his lust forever--

In an instant, the lead diamond dog was killed, stomped under the giant foot of the dragon.

The dragon walked over to his mare and carefully picked her up and out of the sand with ease.

Rarity softly awoke, in so much bliss she didn't notice the diamond dog bones and blood staining his hands. She simply hugged his arm tight and hummed, "Let's get married Spikey Wikey..."

A growl echoed from Spike.

“You’re right… shower first,” she laughed. “Preferably with soap and water…”

******

Hours later, two figures in full hazmat suits arrived from the sky. They landed in the caves and explored the scene. It was still a grizzly sight to behold. Smaller scavengers tore at the remains of the dogs while dodging the slime and cum covered sand.

After their scanners showed no sign of the dragon’s current whereabouts they removed their helmets. Both were dragons and wore thick masks as they examined the sight more clearly. Smolder and Ember.

Smolder carefully removed her mask out of curiosity, only to pull back and gag at the smell. “Damn, when Garble went through his mating season, his musk wasn’t anywhere near this strong.” She tightened back her mask.

“Careful, too much exposure at this strength will send any female crazy,” Ember commented.

“I know, I know, that’s why we are wearing the extra masks. But how is it this strong?”

“Strength depends on how many females are around the male he inadvertently deems worthy.” Ember stared off the distance.

“You mean, Rarity might not be his only target.” Smolder gulped in fear. “Can’t someone else handle it?”

“Don’t tell me you have a crush on him?” Ember teased, “Such a thing will make it harder for us to detain him.”

“I prefer females! Thank you very much.” Smolder protested. “Besides, Spike’s far too weak--” She stopped as she came upon the first body.

“Not anymore.” Ember stood beside her.

“These poor creatures.” Smolder couldn’t hide her sorrow.

“Yes, only a dragon can handle his rage now.”

“A dragon huh. Are you going to handle him?” Smolder jabbed.

“What? I have a wimpy deer husband at home!!” Ember growled. “Besides, a few whore dragons back on the island can handle Spike.” Ember put her helmet back on and nodded for Smolder to do the same. “Now enough banter, we need to remove this musk and cum now. At this stage, it will put any female under a lustful desire to find him or the nearest male!!”

“That might be a problem,” Smolder pointed out to two additional voids in the sand and cum, large enough to be ponies. They assumed the first one had to belong to Rarity. However, outside of the two and diamond dogs it seemed, there was another watching it all. These others were now in far greater danger.

“Anyone these intruders mate with will spread the infection to them as well. Altering their musk and cum to act exactly the same!” With that Ember took off for the exit and to the sky. “I’ll handle the capture of Spike!” She pointed outward, “Follow that trail and detain them.”

“Right!” Smolder flew off as well. She narrowed her eyes on the slippery path left by the intruders. However, turning the other direction only made her eyes widen in fear. The trail led to her old school. “Oh no, oh no!”

Please note, this is a one shot. Any expansion will only happen if the ratings go well. I'm always hesitant with clop stories. This is why my other series involving sex is moving so slow. I don't want to disappoint a small number of fans with an unfinished product.

Yes, this story ends on a cliffhanger, but this is meant right now to purely be an open ending. If you want more, I expect plenty of love, favorites, likes and especially comments.