Don’t mind me, Sis! I ain’t looking!
The bathroom door opened as Fluttershy entered the room and closed it behind her. She walked to the toilet and sat down, relaxing her bladder. An adorable tinkling could be heard as her urine hit the water and she sighed in relief.
It was a beautiful morning at Cloudsdale as she was visiting her parents, having arrived a day earlier. Her parents were delighted to have her as their guest and even had kept her old room intact, even though she had moved out a long while ago. Her brother, on the other hoof, hadn’t changed much in all those years. He was still living with their parents, desperately trying to find a job and especially hit on Rainbow Dash, without much success.
”She’s just playing hard to get!” Zephyr often joked after getting his date calls rejected. Rainbow on the other hoof wasn’t interested of him, as she wasn’t interested in stallions in general, but Zephyr was either too stubborn or too stupid to understand. He thought Rainbow was the mare of his life and he was ready to do everything he could to win her over, something that his big sister didn’t appreciate at all.
Fluttershy loved her brother dearly, but very often she got tired of his antics and arrogance. Still, she tried to understand him as he hadn’t found his place just yet and, and she encouraged him from the background. Usually he just did things without thinking further and lost his interest in them pretty quickly, much to Fluttershy’s annoyance. He could make it, if he just tried!
However, Fluttershy wasn’t thinking of her brother at that moment. She was enjoying the relief as she continued to empty her bladder after the good sleep, her stream keeping its steady pace.
”What should I do today?” Fluttershy was wondering happily as she sat there, bending forward to lean on her legs.
She was happy that Applejack had promised to take care of her animals for a while so she could have some time off and visit her parents. They weren't home at the moment and their house was peaceful and quiet. The only thing Fluttershy could hear was the sizzling of pipes and her own tinkling. She perked her ears to listen to the sounds of her childhood home.
Zephyr must have been sleeping in his room, of course. No wait, there were hoofsteps coming down the aisle, her brother must have been awake. He was walking downstairs. Or was he…?
”Huh?” Fluttershy was confused. She was clearly hearing her brother coming towards the bathroom.
The door was kicked open with a loud bang which startled Fluttershy. She quickly squinted her legs tighter as she saw her brother standing at the door. She had forgotten to lock it, the oldest joke in the book!
”Z-ZEPHYR BREEZE?!” she almost screamed as her brother entered the bathroom without a warning. Couldn’t he see it was occupied?
”Mornin’, Sis!” Zephyr yawned and scratched his rump with his wing. He looked like he had just woken up and his golden mane was a mess. He trotted towards the sink as if he was going to brush his teeth, not even looking at his sister who was doing her business next to him.
”Don’t mind me, I ain’t looking!” he reassured as he straightened himself.
Fluttershy couldn’t believe what happened next…
Not only had her brother entered the bathroom while she was using it, but he also let his 16 inch long pink stallionhood drop down from his sheath, doing it as carelessly as if he was alone in the room. He grabbed his cock with his hoof and aimed it towards the sink, letting out a heavy stream of urine into the drain. He let out a loud sigh and stretched his hooves as he continued to go, letting his member lean on the edge of the sink.
Fluttershy just sat there in shock, not knowing what to think! Using their sink as an urinal wasn’t something she ever wanted to see, but like said before, she loved her brother dearly.
She loved her brother.
As they grew up, Zephyr was the only colt for whom Fluttershy had feelings of any kind and he gladly took part when she and Rainbow Dash were playing together. When Fluttershy was bullied by other colts in her school, he was the one who consoled her when she was crying at home. Such caring and loving little colt grew into a fine-looking stallion, even though his personality changed during his puberty: he became much more selfish and arrogant, thinking too big of himself and being unfriendly towards others, but deep down Fluttershy knew it was just a symptom of the low self-esteem that ran in their family. She was sure one day Zephyr would find his true calling and learn to behave himself.
However, Zephyr’s ego wasn’t the only big thing he had, something which Fluttershy would come to understand. One day she was walking pass the bathroom, and noticed the door wasn’t closed completely. As she thought closing it, she had looked inside the bathroom and had caught a glimpse of her brother’s penis while he was taking a shower. To her surprise she saw him masturbating in the shower stall, his hoof trailing up and down his lengthy member. She was taken aback by the size of his thing and couldn’t take her eyes off it, not until he had climaxed and shot several ropes of his cum into the shower drain.
While Zephyr hadn’t noticed her, she was shocked of the sight and all the mixed feelings she had experienced, that moment having been burned in her memory for the rest of her life. She was never the same after the incident and she thought back to it many times while masturbating in her bed. She had seen her father’s penis couple of times before by accident, but oh boy, Zephyr’s was even bigger!
While she had many weird fantasies, such as having sex with different kinds of animals or having a gryphon eat her clitoris, thoughts of her brother were the ones she was the most shamed of. She knew they were wrong but she couldn’t help but think of his body, his lovely mane flowing down his back when he wasn’t keeping it in a man-bun, his hoof tracing along his erect penis. She used to just lust over his body, but if her brother wasn’t behaving so repulsively, she would have actually fallen passionately in love with him. How come such unattractive stallion had been blessed with such perfect penis?
Now that same penis was only a couple of feet away from her, pouring out golden urine that colored the insides of the ivory sink and the pipes below with a yellow tint. It wasn’t just a memory this time, but a real deal. She could smell the musk emanating from it, mixing with the bitter stench of his piss. To his sister’s surprise, he was wiggling it around the sink slightly, spraying his urine from side to side. Was he teasing her or was he just playing around?
Fluttershy just kept staring at her brother and his fire hose of a dick, not wanting to miss anything. Her clit was winking profusely, but she didn’t have any courage to reach down her hoof to start rubbing it.
After a while Zephyr’s stream started to slow down and soon turned into a light trickle. Zephyr pushed out the last couple of squirts and then started to shake his stallionhood, slapping it against the edge of the sink. He needed to drag on the act for a while to get one stubborn and slightly irritating droplet off his tip, not even caring if there was somepony right next to him watching.
”Oh… My!” Fluttershy squinted her legs tighter than ever as she watched her brother waving his flaccid dick which swung like a leathery whip in his grasp. He had finally gotten the last drop of his urine off as it flung into Fluttershy’s direction and landed on her cheek.
”Eeep!” Fluttershy startled as she felt the warmth of the wet spot on her cheeck and quickly brushed it off with her hoof. Zephyr didn’t seem to notice that as he held his cock high for a moment and looked around it to check if he had gotten rid of all the excessive drops from his tip. He then let go of it, allowing it to swing back and forth between his legs before it finally retracted into his sheath.
”Ahh… Much better!” Zephyr chirped and turned around to leave, not bothering to open the faucet to ”flush” the sink. ”See you around, Sis!”
Zephyr left the bathroom and closed the door with a slam, leaving behind his sister who was still trying to process what had just happened. The smell of her brother’s urine filled her nostrils and she felt she was getting sick. She felt hot all over and her clitoris kept winking like no tomorrow.
She really needed to blow off some steam. NOW!
She spread her legs apart as wide as she could and shoved her hoof on her clit, rubbing it furiously. She was flailing around as she pleasured herself violently, biting her lip to supress her moans. She trailed her other hoof on her teat and rubbed her perked nipple.
Damn you, Zephyr! Why do you have to be the way you are?!!
She kept rubbing herself faster and faster, feeling the pressure rising inside of her until she reached her much awaited climax.
”Unnngh! Mmmm… Nghhhhmmmmhhh!!!” she moaned into her hoof when her marehood spasmed and squirted a thick rope of her excitement into the toilet. She fell back on the bowl, hanging her head limply as she sighed in relief, looking at her soaked hoof for a moment. Then she reached her hoof down to grab some toilet paper.
”Oh my… This is so wrong…” Fluttershy said to herself as she wiped her marehood dry. She flushed the toilet and turned the faucet on to clean the sink. When the stench of her brother's musk and urine was completely wiped off from the sink, she left the bathroom and tried to think of something else.
”What should I eat for breakfast?” She walked downstairs and headed to the kitchen.
But when she had walked downstairs, she saw something else entirely: Zephyr was now in the living room, lying on the couch and casually masturbating as he was watching porn on their TV. Fluttershy immediately covered her eyes with her hooves.
”AAAH! ZEPHYR BREEZE!!” she yelled from the top of her lungs, quite sure everypony could hear her voice outside their house or even all around Cloudsdale.
”Oh, hi Sis!” Zephyr turned his head towards Fluttershy as he kept stroking himself. ”Can't I get some privacy here?”
”Wh- Why don’t you do that in your room, then!?” Fluttershy asked angrily as she tried to look away. She didn’t want to take part of these kinds of activities anymore!
”We have so much better TV down here. Look at the quality of this picture!” Zephyr replied and turned his head back towards the screen. He certainly wasn’t bothered by his sister’s presence as he kept rubbing his turgid member, his precum already gleaming on the tip of his dick.
Fluttershy sighed and backed away slowly. Forget about breakfast, she had already lost her appetite!
”This is going to be a long week!”
Author's Note
I’m so sorry everypony, I made Zephyr hot! 
So yeah, this is the third installment in my unofficial ”Sister’s Watching” trilogy. I was originally inspired by that somewhat famous pic made by Frist44 (which I cannot link, but you know the one!) and some comments people had made in the comment section.
I personally like Zephyr Breeze. While I admit he was depicted as pretty annoying, his character arc and the way Fluttershy wanted to encourage him in the episode were touching. He’s also pretty flawed character compaired to for example Shining Armor, which made him interesting. 
This fic actually made me laugh while I was writing it, the mental image created by some parts was too sick. 
