Hard Study Session

by Daddy Joe

Rating: mature
Tags: Anthro, My Little Pony: Friendship is Magic, Shining Armor, Sex, Twilight Sparkle, Slice of Life
Length: 3893

Corndog magic isn't the only thing Shining Armour is a sucker for.

Shining Armour and Twilight do some studying about anatomy and her recent developments.

This clopfic is based off an old image by Infernal Beggar.

Contains: Masturbation, Incest, Rimming, Hot-dogging and Anal.

Published 2017-03-12 23:30:01 UTC
Last updated 2017-03-12 23:30:01 UTC

Thicc

Author's Note

My first and only clopfic I plan on writing.

Thicc

Today seemed like a normal day for Shining Armor. He woke up, did his daily morning routine, ate breakfast, got dressed, the whole spiel. Nopony was really around on the quiet Sunday morning, it was more of a lazy Sunday. However, Shining Armor didn’t consider any day a lazy day. He was too busy filling in his daily workout quota for any of that. Right now he was in the middle of dumbbell curls with some 45 pounders.

“Twenty-two, twenty-three, twenty-four and twenty-five!” he counted through his paced breaths.

He then switched to his left arm and continued the same action again. When he reached to seventeen, the doorbell rang, causing him to lose his concentration on the task at hand.

“Who could that be?” Shining asked rhetorically as he placed the dumbbell on the floor.

Shining headed downstairs to answer the door. He noticed a shade of purple through the glass that reminded him of somepony he knows and loves dearly.

“Twilight?” Shining thought to himself.

Shining grabbed the knob and twisted it to the left, opening it with a creak. Just as Shining thought, there stood his sister, Twilight Sparkle.

“Twiley! Good to see you sis!” Shining said as he gave her younger sister a noogie on the head.

“Hi, Shining Armour.” Twilight greeted, happily.

“What are you doing here?” Shining Armor asked.

“I wanted to ask you a question.” Twilight replied.

“Lay it out on me.” Shining said.

“I hope you don’t mind, but I was wondering if you’d like to come over to the library later and study with me.” Twilight said.

“Sure. I’d do anything to hang out with you, lil’ sis. What’s the subject?” Shining asked.

“Anatomy.” Twilight answered.

“Having a little trouble with the terms or something?” Shining asked.

“You read my mind, Shining.” Twilight said.

“Okay, sounds good. Look, I gotta finish my workout first. I’ll come over to the Ponyville library later, if you don’t mind.” Shining said.

“I don’t mind. Take all the time you want. I know what you’re like when it comes to doing your ‘daily workout quota’ or whatever.” Twilight said.

“Alright. I’ll see you later, Twily.” Shining said.

“See ya later, big brother.” Twilight said.

As Twilight turned to walk away, Shining immediately took notice to something different about her involving her lower body. Shining’s eyes went wide when he saw the increased size in Twilight’s ass. He watched in a trance as her large ass swayed in harmony with her hips. Even though Twilight wasn’t wearing any tight clothing, but a skirt instead, he could still make out the gigantic globes that were teasingly covered. Shining continued watching in a daze and noticed Twilight’s head slightly shift. Shining quickly slammed the door shut and backed away from the door.

Shining recollected himself and noticed that his huge cock had began to bulge a little bit.

“What is wrong with you, Shining!? You can’t be turned on by your sister!” he exclaimed to himself.

Shining then shook his head to get the thought of Twilight’s large posterior out of his mind and focused on getting back to his workout.

Shining headed back upstairs and commenced his workout once again. While he exercised, the thought of Twilight’s ass lingered into his mind once again. What amazed him was that Twilight never had a butt so big before. She would be considered average. Another thing he thought was how well her new ass still fitted her normal body proportions quite nicely, but her ass was still the most biggest feature.

As Twilight’s giant bubble butt still lingered in Shining’s mind and soon began to move into his imagination.

“Stop!” Shining told himself, but he couldn’t help it, he was sucker for large butts.

He soon imagined him grabbing large handfuls of Twilight’s booty and how it would feel. He was now getting even more aroused than before. Never in his in his entire life would Shining think he would be turned on by her sister just because of the size of her huge asscheeks.

“Ah. Maybe a shower will get it out of my head.” Shining suggested to himself.

Shining then grabbed another outfit from his closet and headed off to the bathroom. He began to undress himself, revealing his semi-solid horsecock. With that, he reached over and turned on some warm water to begin with. After the water warmed up a bit, he stepped in and washed his hair. He than began to wash his underarms and all of the spots that would give off odor.

Everything seemed to go all right at first, but then Twilight’s humongous ass crept into his imagination once again. He imagined his sister pressed up firmly against the glass door of the shower and fucking her without any hesitation to stop. Shining Armor slammed his fist against the wall and tried to stop his perverted fantasies, but his lower region disagreed with him. Before Shining knew it, his giant cock was at its full expanse of thirteen inches. He looked down at the erect member and realized it wasn’t gonna go down so easily.

“Fuck! Okay, I’ll give you a quick jerk-off and then I pretend this never happened again.” Shining said as he began to create suds in his right hand.

Shining than firmly grasped his cock in his sud covered hand and let out a sigh of approval at the slight stimulation. Shamefully, he began to slide his hand up and down the shaft repeatedly to the thought of Twilight. His fantasy turned towards her ass once more, encouraging him to pick up his pacing.

“Twiley….” Shining hissed, softly.

Shining grabbed the shower head as he tilted his head downwards with his eyes closed and started making even more quick jerking repetitions and felt his mini climax approaching.

“Haaaaahh.” Shining moaned as tiny ropes of semen began to splurt out of his urethra and onto the mirror of the shower door.

Shining slowly opened his eyes and his once hard member had begun to shrink back to flaccid mode.

“Happy now?” Shining asked to himself.

After giving his meat a good ol’ rub, Shining turned off the water, walked out of the shower and put on a black T-shirt, boxers, and khaki cargo pants. Drying himself off, he remembered his promise he made to Twilight. He really didn’t want to go now, but he made a promise and it wouldn’t want to have his sister upset.

And so, he slipped on his black, mens boots, tied them, and commenced his walk to Twilight’s library.

Shining Armor walked casually through Ponyville with his hands in his pockets and whistled a little tune as well. His sexual fantasies from earlier have seemed to have subsided, which made Shining feel a whole lot better. While walking to Twilight’s library, he came across a familiar face named Spike.

“Shining Armor!” Spike exclaimed.

“Hey Spike. How’s it going, little bro?” Shining asked.

“Eh, not much.” Spike replied.

“Cool, cool. Where you heading to?” Shining asked.

“Twilight sent me on few errands. It’s gonna take me awhile to get them done.” Spike answered.

“Is that so? Where did she send you to?” Shining asked.

“Well first, she sent me to go pick up some groceries at the store and all of these other places around Ponyville.” Spike said.

“Sounds like a lot of work.” Shining remarked.

“I get used to it. So where are you heading?” Spike asked.

“Oh, right. Twilight invited me to study some anatomy with her.” Shining said.

“That’s nice. A little sister and brother bonding time, huh?” Spike asked.

“Yeah, you could put it that way.” Shining said.

“Well I best let you get to that because i’ve got a lot to do today.” Spike reminded.

“No problem. See you around, Spike.” Shining said with a wave.

“See ya.” Spike replied as he walked away.

After that little conversation, Shining Armor continued his walk to Twilight’s. About half-way there, Shining Armour thought for a moment. Why would Twilight send Spike on errands that would take him “awhile to get done?” The more he dwelled on the idea, the more he began to think that Twilight had something planned for him, something possibly lewd.

“No…. uh-uh, no way. Why are you even contemplating this?” Shining asked himself.

Shining then rejected the thought out of his head and continued his walk. Shortly after, Shining Armor finally made it to the Ponyville Library, Twilight’s home. He felt a little anxiety feeling in his chest as he took in a deep breath and knocked on the door two times. He then slipped his hands in his pockets again and looked around while he waited. About twenty seconds later, the door opened.

“Hey, Shining! I knew you would make it” Twilight said, happy of his arrival.

“I did tell you I’d come, didn’t I?” Shining asked her.

“Well, I guess you did say that,” Twilight said. “Come on in.”

Twilight then turned around and Shining Armor followed behind her.

“Nope. Not gonna look.” Shining thought to himself, resisting the temptation to check out his sister's large posterior.

“Alright, so here’s what I got planned,” Twilight began as she grabbed flashcards. “I’ve made a whole bunch of flashcards that will be divided into two sections; anterior and posterior.” Twilight said.

“So, are we focusing on body parts, muscles, or skeletal?” Shining Armor asked, skeptically.

“The skeletal system.” Twilight answered.

“Alright then.” Shining said.

“All you have to do is show me the card and I’ll point to the specific area of the bones location.” Twilight explained.

“Sounds good. We studying here?” Shining asked.

“Actually, we can head upstairs and study, if you don’t mind.” Twilight said.

“Sure. I don’t mind.” Shining replied.

“Great! Let’s go.” Twilight said.

Twilight led the way up the stairs while Shining Armor followed close behind. He kept his head down for most of the walk up the stairs, but couldn’t help but to look up for at least a second. Shining’s head shifted upwards and got a good up-skirt view of Twilight’s ass.

“Dear sweet Celestia.” Shining said, mentally.

His eyesight was now locked on Twilight’s underass that was so close to being covered up fully by the tubular fabric. His cock began to pulse again as Twilight’s cheeks jiggled with every step she took up the stairs. At this point, Shining was mesmerized by the sight of Twilight's plump hindquarters and couldn’t keep his eyes off them.

“Okay, here we are.” Twilight said, breaking Shining’s trance.

“Already?” Shining asked, surprised.

“Well, yeah! It was only thirteen steps upstairs.” Twilight said.

“Right. Maybe I’m just tired.” Shining said, covering up his real thoughts.

Once they both made it into Twilight’s room, Twilight turned towards Shining Armor.

“Okay, let’s get started.” Twilight said.

“So, I just say the terms and you answer?” Shining asked.

“Yep. You say the term and I’ll point to the specific area.” Twilight clarified.

“Okay, let’s see….” Shining said as he looked through the cards. “First is humerus.” he began.

“Humerus.” Twilight answered as she pointed to her upper arm.

Shining flipped the card over and the word “upper arm” was written on it.

“Good,” Shining replied. “Radius.” Shining Armour said.

“Radius.” Twilight answered while pointing towards the right side of her forearm.

Shining Armour flipped the card over and it read “right side of forearm.”

“Doing good so far.” Shining Armor said as he took out the next card. “Pelvis.” Shining stated.

“Pelvis.” Twilight answered as she pointed to the location of her pelvis.

Shining directed his attention to Twilight’s hips, which were somewhat wider in than before and acted as a compliment to her newly large butt. He quietly gulped to the sight and flipped the card.

“Correct.” he said.

Twilight then started to give him this look, a look that seemed rather…. seductive in a way. Shining stared at her sister in the eyes for a moment as his heart began to beat a bit faster.

“N- next term.” Shining Armor stuttered.

Shining took out the next card and it read something that differed from the terms that were intended for the study session.

“Gluteus Maximus.” Shining said, unknowingly at first.

Shining Armour’s eyes quickly went wide as he realized what he just read. Twilight continued to give him the seductive, half-lidded expression as she turned around and placed her hand firmly on her right asscheek with a slap, causing it to jiggle.

“Y’know, big brother, I never really thought you were someone who would take interest in their sister’s ass. Not that I can blame you.” Twilight said seductively as she wiggled her hips side by side. This movement caused her two, bulbous, cheeks to wobble and bounce.

“Y-y-you’re crazy, Twilight! I would never do anything like that!” Shining denied, desperately, trying to sound as disgusted as he possibly could.

“Don’t deny it, Shining. I know you like this ass. I pieced it all together when you slammed the door shut when I turned my head to look back at you.” Twilight revealed.

Shining Armor’s cock began to become erect again and sweat secreted from his pores. He backed right up against the wall and had nowhere else to go. Twilight then walked over towards him and pressed her bubble butt against his crotch.

“It seems like your lower body region disagrees with you.” Twilight said, devilishly while grinding her ass against his bulge.

Shining let out a slight moan as he spilled the beans to her.

“Okay, I admit it! I love your ass so much and I want it right now!” Shining exclaimed as he enjoyed the feeling of Twilight’s fat ass rub up and down.

“That’s what I thought,” Twilight replied back, halting her tease. “Maybe we should take our clothes of in order to get a bit more comfortable.” Twilight suggested.

“Yeah, uh-huh.” Shining agreed with her.

Shining Armour quickly removed his t-shirt and tossed it aside and undid his belt. Twilight did the same with her shirt as threw it aside. Shining Armour at the time had already taken his pants off and was left in his boxers with a massive bulge pointing outwards.

Twilight raised her right eyebrow in response to the sight of her brothers monstrous bulge. She then began to grasp the waistband of her skirt and pulled downwards. The skirt got stuck for a moment or two before it made its way past Twilight’s huge buttocks, revealing a pair of white panties with blue stripes that were wedged deep in her asscrack. She than hooked her fingers around the waistband and pulled them down slowly to reveal the holy ass. Shining emulated her actions and quickly removed his boxers, revealing his impressive member. Shining Armour observed silently as he drooled over his sisters lavender ass. It was perfectly large, round, smooth, and pillow-liked. Even the slightest touch could depress it.

“What do you think, big brother?” Twilight asked with a shake of her ass.

“Twiley…. it’s so... perfect.” Shining responded dazedly as walked closer to his obsession.

“What are you waiting for? Go ahead and take it.”

That’s all the encouragement Shining Armour needed to get on his knees and bury his face deep into Twilight’s over-sized cheeks. He wrapped his arms around her thick thighs tightly and began to eat her out.

“Oh, Shining.” Twilight moaned.

His began to lick at Twilight puckered entrance and didn’t taste anything disgusting at all. Shining’s tongue began to penetrate her entranced over and over again. Twilight responded by letting out small pants every time he tongue-fucked her. He repeated this action for quite sometime before he got an even better idea.

“Twilight, get on the bed and lay on your stomach.” Shining instructed as he removed himself from Twilight’s gigantic ass.

Twilight climbed onto her bed and lied flat on her stomach with her elbows resting on the two pillows in front of her. Shining Armor took notice that the position she was in made her ass look even more larger and curvier than before. With no hesitation, he hopped onto the bed, climbed on top of Twilight’s upper legs, and got on his knees.

Shining Armor slowly took his palms and began to press into the doughy mounds of ass that was in front of him. Everytime he pressed, his hands would sink into the squishy flesh as if it were clay. After that, Shining Armor proceeded to spread Twilight’s asscheeks, revealing a six-inch deep ass valley that provided ample room. Eagerly, he placed his cock betwixt the lavender mounds until it reached the base.

“Yessss.” Shining Armor mesmerized, his heart beating hard as he took in on how much ass there was.

Letting go, Twilight's buttcheeks receded back to their original position, slightly wobbling before settling. Shining looked down and took in the sight of his dick hot-dogged in between those large, soft mounds that only left the top part of his member exposed while the rest was absolutely smothered by ass. He then began to squeeze both of her large, pillow-like cheeks together to efficiently milk his cock.

“Celestia, look at it disappear right inside those fucking asscheeks.” Shining groaned.

Twilight giggled in response to the comment.

Finally, Shining slowly began thrusting his cock, Twilight's butt tugging and massaging his penis. The anatomy of each thrust was truly an erotic sight to break down. As he pulled back, the whole member would travel through the valley halfway before being pushed back all the way through. The head would be only part getting a breath of air, precum leaking onto Twilight's lower back.Shining began to pick up the pace even quicker as the feeling of his member engulfed by warm, soft buttflesh began to grow on him, lost in a sea of pleasure that made him moan with bliss.

Twilight’s ears began to lower like a pair of deflating balloons as she loved the feeling of her brothers hot, thick, diamond-hard cock ride in between her ass. Soon enough, both of them were moaning softly in harmony with each other, but Shining was getting close. He wanted to pull out from her asscheeks, but it just felt so good. And so, Shining Armor's orgasm had finally arrived like a freight train. While squeezing the lavender booty harder and putting more effort and vigor in his thrusts, he came with a mind-bending orgasm.

“Fuck! Yes! Yes! Yes!” Shining repeated as he blew his load all over Twilight’s lower back, blushing and biting his lower lip.

When Shining released his load, most of the hot, ropey semen would collect together and form one big glob on Twilight's lower back while the last drops of his jizz leaked out of his shaft and coated the valley of bubble butt, creating a schlikk sound with each remaining thrust. It was an astounding lubricant on Shining's part. His high lasted for about a good ten seconds before he calmed down.

“You didn’t manage to put it in yet. Have I really developed that much?” Twilight asked as she looked back at the amount of semen.

Some may argue that Shining had a problem with premature ejaculation, but we all know that Shining got a little bit overexcited with a Twilight donk like that in front of him.

“I’m sorry, Twiley. You’re just so….” Shining Armour trailed off.

“Big?” Twilight finished.

“Yeah…. How did it get so big in the first place?” Shining asked while panting.

“Well, believe it or not, it has to do with a spell.” Twilight said.

“Yeah?” Shining asked.

“Mmm-hmm. Or what should say, an accident.” Twilight said.

“What happened?” Shining asked.

“So get this. I conjured this spell that was meant for accelerated growth, but I guess I messed up on something and it created more adipose cells.” Twilight said.

“Adipose cells? I’m not really familiar with those scientific terms.” Shining said.

“Basically fat cells.” Twilight answered.

“Oh,” Shining replied. “Do the effects wear off?”

“So far…. no, but they should eventually. For now, I have this big butt that you absolutely love.” Twilight said, slightly rubbing Shining’s cock with it, bringing it back to life.

“Now how about I try again?” Shining asked.

“Sure, big brother. This time inside.” Twilight replied.

“No problem.” Shining said.

Twilight remained in the position that she was in and Shining used some of his leftover semen as a lubricant for what he was about to do.

“Ready?” Shining asked.

“Ready when you are.” she replied.

Shining slowly began to poke the head at the entrance of Twilight’s ass. Once Twilight adjusted to the feeling, he pushed slowly inside as her soft flanks rubbed the side of his shaft. Shining Armour gritted his teeth as he entered Twilight's ass and felt the warm, moist walls clamp on his cock tightly.

“So tight.” Shining moaned.

“Oh, Celestia. You’re so big.” Twilight grunted.

Shining began to thrust slowly and the feeling of Twilight’s insides were absolutely amazing. Sure, the hot-dogging was pleasurable, but this is at new all time high. Shining gripped onto and squeezed Twilight’s ass for support as he began to thrust even quicker, emitting a very lewd sound in the room. Twilight moaned loudly with each thrust, making Shining Armour even hornier. He bit down on his lower lip again as it felt like he was thrusting a million times a minute.

Unfortunately, he knew this experience wasn’t going to last forever. Shining tightened his core muscles to buy more time for him and Twilight, but it was only a short amount. Twilight’s tongue lolled out as she panted in pleasure over and over again until herself had a mind-splitting orgasm as well. This sent Shining over the edge and triggered his climax.

“NGGH! OH FUCK YES!” he yelled in ecstasy.

Shining Armour blew a load even bigger than before, so much that he could’ve been urinating the cum. Twilight’s insides were then coated white and she loved the feeling of hot cum fill her up. Shining softly collapsed onto his sister's back and panted softly along with her.

“T-thanks, Twiley.” Shining muttered.

“What are sisters for?” Twilight asked.

While they had their little moment, both heard something that made their stomachs drop; the sound of a door opening downstairs.

“Twilight! I’m home!” Spike yelled in a sing-song voice.

“Horseapples!” they both said.

Shining pulled his softening cock out of Twilight and Twilight began to clean the semen off her lower back. Than, both of them quickly put their clothes back on.

“Twilight? Shining?” Spike asked at the foot of the stairs.

“We’re up here!” Shining shouted back.

Spike could be heard walking up the stairs.

“Quick! Get the cards!” Twilight whispered.

Shining hastefully grabbed the cards off the wooden floor and put them back in a neat pile.

“Cervical!” Shining exclaimed.

Twilight pointed to her neck in response.

“How’s that studying coming along?” Spike asked.

“Oh you know…. great.” Twilight replied, nervously.

“Well, that’s good,” Spike said. “Like studying with your sister?” Spike asked Shining Armour.

Both Twilight and Shining looked at each other.

“Yeah, you could say that.” Shining answered.

“Sounds good! I’ll just leave you guys to it.” Spike said.

Spike headed back downstairs and they both looked at each other again, sighing in relief.