Sister

Tick, tick, tick…

The constant monotonous tick of a clock filled the otherwise quiet library. Periodically the sound of hooves brushing against the carpet of the oval room played out, along with the frustrated groans of the stallion inside of it. Shining continued to search the endless amount of books in hopes he could find something related to dealing with a mare in heat. He had no such luck, even with the vast collection of spells at his disposal.

"Why don't we have anything on this?" He groaned as another book came to a close.

Shining stopped, realizing he was talking to no one but himself. Taking a deep breath, he looked up as he laid the book on the floor and saw he still had a large portion of the library to explore. He already cleared two full shelves and saw he had another eight to go.

He grabbed another; a book titled 'A Beginner's Guide to Body Alterations' he was even more hopeful than before. Holding the book, he sat himself down in a large blue bean bag cushion and began to read. A lot of it was interesting, but mostly insufficient. There were spells covering size alteration, mane and coat hair extending, and even a spell that could alter his voice, yet even with a book covering body spells, he came up fruitless with an answer to his question.

He looked up at the clock, noticing an hour had passed since he first arrived. His already tired mind grew more tired by the second and it started to show. A mild headache had formed and Shining groaned as he clenched his eyes shut, before he rubbed his forehead. His frustrations started to peak, and in a fit of anger, he chucked the book at the shelf from whence it came.

"What did that book ever do to you?"

Shining opened his eyes as a familiar voice filled his ears. He knew it was his sister right away and he tensed up completely when he saw her enter the room. Her appearance was much the same, but he noticed her mane was more of a mess than before. What was once bed hair, now looked like she had been constantly rubbing her mane backwards while twirling a bit of it with her hooves. It looked like a wreck that reminded him of a bird's nest. He would have laughed if he wasn't afraid of the situation he was in.

"I thought you were resting?" Shining asked, noticing her face looked more flushed than before.

"Body is still acting weird and it's only getting worse. Now it feels hot and itchy back... there," she answered as she winced and raised her back leg, before she rubbed her thighs against each other. "But why are you throwing books around and why is the library a mess?"

Shining looked around and saw most of the books he searched were either sprawled about aimlessly or stacked up awkwardly.

"Sorry, been trying to find a spell to help you," he apologized as he looked away. "Kinda getting frustrated with finding nothing though."

"I appreciate the effort, but at least keep everything the way it was before," Twilight huffed with annoyance as she started to return the books to the shelves. "You know how Mom gets when everything is unorganized."

"Sorry, you're right," Shining sighed as he watched her put the books away.

It went quiet and Shining looked to the untouched shelves, until he noticed she had her back to him. He quickly looked away but not fast enough to notice a wink from her swollen clitoris. He cringed and felt his lower body react again and his nose picked up her scent. It smelled much more potent and knew it would drive him mad if he had to stay around her. He opened his mouth and began to breathe in through it, in hopes her scent wouldn't be as intense.

"You have any idea what's wrong?" He asked randomly, as he grabbed another book with his magic.

"Well… while I was laying down, I started to remember something," she answered, without looking back at him. "This isn't the first time I've felt like this."

"When was this?" Shining cocked his brow but kept his eyes on the book.

"Around the same time last year now that I think of it," she answered quietly, before she spoke louder. "It was the same feeling as now. I went to Mom and told her how I felt, before she cast this weird spell on me."

"What did the spell do?" Shining's ears perked and his eyes widened.

"I don't know how to best describe it," she began. "It cooled me down in a way and the itching feeling was gone. I asked her what she did and though I don't remember her exact words, she said something along the lines of fixing a problem all growing mares deal with."

"Did she tell you what the problem was or what the spell was?" Shining asked with growing excitement in his voice.

"No," Twilight replied in a sullen tone, which caused him to sulk back in his cushion. "I was hoping I could find the spell somewhere in here, but without a name, I don't know what to look for."

Shining sighed, as he grew more frustrated by the minute. Knowing a spell existed that suppressed her heat was great to hear, but without the spell itself, it amounted to nothing. Even with that, Shining had to take another positive note from it. It wasn't her first heat and knew it was better to tell her about it, instead of playing the fool in the matter.

"I think I know what's wrong with you, Twiley," he spoke up, which caused her to turn around and look at him with a growing smile on her face. "Did Mom ever tell you about estrus?"

"Estrus?" Twilight tilted her head and gave him a puzzled look. "I haven't heard that word before."

Shining grumbled, knowing he had to be the one to explain it to her. In all honesty it didn't surprise him, considering school didn't teach him about it until he was fifteen. He just wished his parents would fill her in.

"It's what's happening to your body right now," he began. "It happens to mares every year around this time once they're old enough. Your body gets hot and you feel the need to… umm." He stopped, a bit of embarrassment started to show on his face.

"Umm, what?" She replied.

"I don't know how to be subtle about this, but… wait, different question first," Shining started, but changed his line of thinking half way through. "Have you ever had urges?"

"Urges?" She asked as she grew more curious.

"You know, the urge to rub yourself in a way," he answered sheepishly.

"Rub myself? Why would I need to rub myself?" She asked in return.

"Okay, different approach," he sighed. "How about the urge to put something inside of you?"

"You mean eating? Shining, I'm not hungry if that's what you're suggesting." Twilight puffed her cheeks out at him, almost like she was insulted by the implication.

"I can't be subtle about this can I?" He groaned as he looked to the ceiling.

"Subtle about what? Why don't you just say it?" She rebutted, her voice started to fill with anger. "Just tell me what estrus is already!"

"Fiiine, I give up. I'll just say it: Twiley, you're in heat and your body is horny!” Shining whined loudly.

"Horny?" Twilight blushed as she started to reach for her horn.

“No, not that type of horn. Ugh, since you don't know what sex is, you probably don't know what an orgasm is either right?" Shining asked, growing flustered and very annoyed.

Twilight shook her head no.

"That hot and itchy feeling you're experiencing is your body telling you that you are horny and that you need an orgasm, a release of sexual tension. The best way to do it is to either rub yourself or have a stallion or even a mare do it for you," he answered fully as he sank back in his cushion and sighed. "The first is called masturbation and the second part is called sexual intercourse; it's the equivalent of a male and female loving each other in a more romantic way."

"Oh? Ooh! Is that what it's called?" Twilight replied in an excited manner. "I've seen ponies doing that!"

"Wait, what?" He replied, shocked to hear that revelation. "It wasn't Mom or Dad was it?"

"Eww, no," she replied with disgust in her expression. "Why would you get that idea?"

"Just a random thought," he lied as he blushed at an old memory of seeing his father face deep in his mother's privates one night as he was going to the bathroom. "Where did you see it?"

"Well," she started as her already flushed face grew more red. "During one of my overnight visits with Celestia, I snuck out of my room to explore the castle. While out, I happened to see something that sounded like what you said."

"Go on." Shining grew more intrigued.

"I saw a guard pony and a maid pony hiding near the garden and the maid was," Twilight stopped and looked away as she crossed her back legs. "I saw her sucking his… umm, what's it called?"

"His penis?" Shining answered, unamused.

"Yeah, that! She was sucking it because it was all hard and pointy. His penis was all 'horny' so that's what you meant right?" Twilight asked, her voice too innocent for the words she conveyed.

Shining didn't know to answer that for a second, but she was technically correct, if not slightly awkward in her portrayal of it

"Uhh y-yeah, you're right actually. How long did you watch them?"

"Not long. It made me feel weird as I watched it, and it's kinda how I feel now, just it was nowhere near as bad," she answered before she stopped and looked at him with a nervous look on her face. "Are… you going to have to do that to me? I mean, I don't have a penis, but are you going to have to stick your face where it's all hot and itchy?"

Shining tensed up, the conversation going in a direction he knew would happen, but subconsciously hoped it wouldn't. He wished he kept quiet and with her popping the question, he knew it was now a 'Make or Break' situation. The way he wanted it to go was to say no and hoped he could find a spell, but his perverted mind and body were saying otherwise. Thankfully his morals outweighed his foolish desires and he stayed strong.

"I can, but I can't," he replied, and he was sure he saw her expression sink into disbelief. "I'm sorry, Twiley but two ponies who are related can't do this. It's called incest and lots of ponies view it like dark magic. It's forbidden and taboo, and Dad told me if you ever go into an estrus cycle when he's not home, I'm supposed to lock myself in my room."

"But dark magic hurts ponies both physically and mentally. Is incest supposed to hurt?" She asked.

"No, sex isn't supposed to hurt but, it's frowned upon because incest can lead to… complications."

"Complications?"

"Look its hard to explain, but Dad told me that I can't have sex with you."

"B-but… why would they leave me home with you if they knew this would happen?" She asked, visibly confused.

"Ponies don't go into a heat cycle this early in the year," Shining noted that it was a week earlier than the usual cycle hit. "Plus they had the summit on their minds for the past week and they must have forgotten about it."

"So what am I supposed to do? Wait?" She asked further, frustration started to surface in her voice. "I don't think I can wait all day until they come home."

"That's why I'm trying to find a spell to fix this mess," he replied as he floated a book in front of him. "If I can find a spell then I can make it stop."

"Okay but… we could just… do it and not tell anyone," she replied meekly, almost like she didn't want to say it herself. "It's just us and if you can make it go away, then we don't have to search for a spell."

"Twilight, we are not having sex!" Shining answered back, red faced and embarrassed. "Mom and Dad will kill me if they found out about this!"

"But it's really bad!" She whined as she fidgeted her back legs. "Plus they won't know about it. I won't tell, I promise!"

"That's not the point!" Shining snapped back, as she jerked her body back out of fear for the level of anger in his voice. "Sorry… but I'm scared I may knock you up if we did it."

"Huh?" Twilight asked.

"Ugh, do you know where foals come from?" Shining asked as he brought a hoof up to his temple and rubbed it.

"Oh. Celestia told me a big heron-like bird delivers them to moms and dads in the night!" Twilight replied with a chipper tone in her voice. "But what does that have to do with anything?"

Shining stared forward and his mouth hung open. Normally he would have corrected her on the spot, but the fact that she stated Celestia told her that complicated the matter. Twilight was a mare that looked to Celestia like she was a living god among ponies and every word or fact that she stated was right and absolute. If Celestia told her a pig could fly without magic, she would believe it. If Celestia said two plus two equals five, then Twilight would find every book stating otherwise and try to change it. Shining may have been her older brother that she admired, but when compared to Celestia, it was like comparing an ant hill to a mountain. He wouldn't win the argument even if he tried.

"Forget I said anything," he replied, almost forcing himself to bite his tongue in the process. "But my point still stands; we aren't having sex. You just have to wait."

"And my point also stands; we won't tell Mom or Dad," Twilight spoke back, as a stubborn expression appeared. "I don't wanna wait! I want it now!"

He loathed her stubborn attitude and barely ever had to deal with it, yet whenever it surfaced he almost always gave into her demands. He had one card up his sleeve though, and knew he had to play it.

"Twiley, don't make me evoke the rule of Sibling Supreme," he told her as a confident smirk appeared on his face.

This time it was Twilight's mouth who went agape and she knew she wasn't going to win the argument. Whenever there was a fight, whoever had the crown of being the supreme sibling, would automatically win all arguments. Fortunately he was the current holder of it and he could tell she wasn't happy with it.

“What? Why? That’s not fair!” she snapped at him as she stamped her hoof into the ground.

"Yeah well you’re acting like a brat!” he snapped back. “Look, I know you’re not feeling well but we are not having sex! Now, I'm going to continue searching and I want you to go to your room," Shining ordered as the scent from her body now clung to both their coats.

Twilight went quiet, stamped her front hooves, and sat her haunches on the ground. Even with her sensitive backside bothering her, she didn't wince or show it in her expression.

Unfortunately Shining started to hit his limit with the situation. His own body was starting to feel hot and thankfully the conversation kept his mind off of sexualizing his sister, but he felt it start to slip. He wished it would stop, he wished she would not try to argue with him, and he wished he didn't have to foalsit his sister because his parents were too lazy to hire a proper sitter.

"Go to your room," He ordered with a stern intensity that made Twilight lean back.

She refused regardless.

“NOW!”

He breathed heavily as he stared at her, the corner of his mouth trembled and his teeth gritted. He was unaware of how angry he looked and for a few seconds he wasn't sure why Twilight looked at him with confusion on her face. It wasn't until Shining heard her let out a sob that he quickly calmed down.

She let out another, but he could tell she was trying to hold back. She continued to stare at him with angry eyes and her lips started to tremble as time dragged by. He felt bad but he didn't know what to say to her. He knew he had to do something but he couldn't muster up the resolve to do anything at the moment, until finally his words returned to him.

"Hey I didn't mean-"

Twilight cut him off and huffed loudly at him before she turned around and began to trot away. Her backside greeted him again but his mind was too fixated on her expression. She didn't look back but as she reached the door, Shining watched her expression sink into despair and sadness. He felt his heart sink and it felt like gravity started to crush his very soul. He made his sister cry, something that he promised he would never do to her. It hurt more than anything and he wanted to apologize to her, yet the words didn't come. Only the sound of hooves transitioning from carpet to tile flooring played out.

"Why does this gotta happen to me?" He whined loudly as he dropped the book, his mind a jumbled mess.

He felt like crying himself and got ready to throw his face into his bean cushion, until the sound of a door slamming echoed from the hallway. He looked up and knew he would have to fix the problem he caused. He didn't want to go near her but he couldn't ignore what he just did. If anything, he would apologize for his actions and continue to search the library. He couldn't let her stay mad at him all day, fearing the repercussions of it, but he also feared going near her. He was at a crossroads with his mind, frantically debating going left or right; do as his parents instructed and wait it out, or be a big brother and apologize for what he did.

Finally after a few minutes of mental anguish, he looked up at the clock and noticed the numbers had returned. He looked down to the book and saw the magic circle return as well, which caused him to relax.

"I can do this, I'll apologize and then continue to search for the spell," he spoke to himself, in an attempt to bolster his confidence. "Just go in, apologize, and go out. Quick and easy; nothing can go wrong."

He took another deep breath and stared at the doorway. He smiled weakly and began to walk to Twilight's room.