Lightning Dust walked through the vast hallways of the Royal Palce, her target - and service trolley - right in front of her. Her short skirt bounced about with every step she took, purposely cut so that it only barely didn't reveal what lay underneath. According to the headmaid, that was so that they could catch the eye of the palace's guests more easily. Sometimes, according to her, they would even invite certain maids to their rooms and-
"No, don't think of that now, Lightning! Focus! You've got a job to do." She chastized herself.
Only a few weeks prior, after her stunt show near Ponyville ended with her strapped to a rocket, did she decide to take a new job... Or rather, she landed right in front of it... in front of her. When Lightning Dust hit the ground again, she crashed into the Royal Garden, directly in front of Celestia.
At first, she had thought that she would get punished for not only performing stunt shows all over Equestria without a proper license, but also - and foremost - because she had almost crashed into the Princess of the Sun and had ruined quite a few flowers in the process. However, the princess seemed just as kind and forgiving as they always said, as not only did she not punish her, but - out of the blue - came up with a job offer.
Fast forward to the present day, Lightning Dust has settled in with her new job. Her work was even more challenging than anything the Wonderbolts and Washouts had ever done - which in, all honesty, was only a bonus for her. She got a decent pay and she even got to work around the princesses! It all was truly better than she could've ever imagined, were it not for a tiny detail that miffed her experience a little.
The heat-season had arrived and just like any other mare at this time of year, Lightning had applied for estrus-leave. However, it was declined, which didn't really surprise her all-too much. After all, they had to maintain at least a skeleton crew, even during heat season, which meant that some mares had to simply endure it and push through - not a problem for a former stunt pony like her! At least that was what she thought, before she looked at the service roster of today and saw which rooms she was tasked with this morning. Prince Blueblood's personal chambers.
A shiver went down Lightning Dust's spine and an itch made itself known between her hind legs. She hadn't met the prince thus far and rumours are rarely completely true. However, that didn't change the fact that he was a stallion and being even just in the vicinity of a stallion was generally concidered a bad idea if you were in heat. Not to mention spending most of the day in his room and - subsequently - his close proximity.
She quickly shook her head free of any thoughts, lest she'd do something that could cost her her new job. She had reached the door to Blueblood's chambers, only a thin piece of carpentry that stood between her and possibly the hardest challenge of her life thus far.
With a last encouraging sigh, she gently pulled the door open... and was immediately assaulted by a thick wave of bedroom air. It smelled like the windows hadn't been opened for a week. The air was filled with a very distinct scent. The scent... of stallion.
Lightning Dust's marehood winked when the smell hit her, but she managed to keep herself together... for now. She entered the dark room and placed her service trolley at the bedside, before going over to the windows and opening the curtains. As soon as she did so, she heard movement behind her and, turning around, she noticed too late what it was.
Prince Blueblood was still in bed, writhing and groaning from the sudden disturbance by his aunt's sun, but remaining otherwise undisturbed. Lightning Dust, meanwhile, was standing stock-stll beside the window and stared at the prince. she felt her panties cling to her, as her pussy moistened up.
She quickly shook her head and looked away. "No, Lightning, keep it together! You want to keep this job, don't you? You've got to stay professional!."
And so, she tried to quench her carnal desires with work. She dusted off every surface, cleaned the floor and windows and was just about to sweep under his bed, when she heard the prince rustle about again. She looked up and found that he had turned onto his back, slinging the blanket halfway off the bed in the process and revealing his sleeping form underneath.
Lightning Dust, again, stood still and stared. From her angle, she had a perfect view at the prince's unprotected belly... and lower regions. The short distance between them didn't really help her resolve either, as she tried - and failed - to force herself to look away.
She glanced over to the door... then back at the prince... and then licked her lips.
"Well... I mean, it can't hurt to... touch it once... or twice... right?" She mumbled insecurely to herself, while her body was already moving to the foot-end of the bed. She then used her wings to softly lift herself up and set down between the prince's hind legs and took her time to marvel at what lay before her.
Prince Blueblood was by no means a small pony and there have - of course - been rumours about his length and such, but if these two Bowlingballs were any indication, then even the most adventurous rumours were still far below the actual.
She slowly inched her hoof closer and gave his testes a gentle nudge, tracing them with her eyes as they bounced back and forth from it. She then moved her attention further upwards, to the slightly wrinkled skin that connected upwards from his balls, and traced a hoof along his sheath. She watched as his thick stick rose from its depths, slowly growing bigger and bigger and bigger yet.
When the prince's, positively massive cock had finally stopped growing, it was easily large and thick enough to support Lightning's weight without a problem. She, in turn, sat in awe at its ginormous size and couldn't help but fantasize about what it would feel like to have this absolute monster of a dick slam into her and pump her full.
She traced a hoof along the monstrocity before her. It was easily as thick and long as her foreleg and attached to a member of high nobility at that! The stallion himself, to her, wasn't bad either. He had a dashing white coat and a marvelous mane. His horn rivaled his other one in length and his piercing blue eyes...
Lightning recoiled as she noticed that his eyes were open, swinging backwards so hard that she almos fell off the bed. "M-My Prince! This- This isn'- HMMPF" ... Only to find herself grabbed in a blue aura and smashed into the prince's crotch, where sho got a deep whiff of the stallion's musk.
"I thought it was common sense to finish what you started. Go on then." He commanded her, guiding her head over to the base of his shaft.
Lightning looked up to the prince again, almost drooling, when she saw the absolute monstrum of a dick that bobbed up and down beside her. With a last, futile attempt at self-control, she tried to clear her mind again... but she had already completely lost all of her resolve. The heat had overpowered her completely and she was now a slave to her primal desires. This was her stud and her only goal was to breed.
She slid down between the prince's hind legs, taking in more and more of the stallion's musk and as soon as his balls came before her eyes, she began sucking on them. One of her hooves immediately traveled down to her panties, where she started playing with herself, while she used the other to slowly pull herself up to Blueblood's chest again. While she did so, she traced her tongue along his massive meatpole, all the way to the tip, where she stopped. She licked around it, looking up at Blueblood and waiting for his permission to take a first taste of his treat. He, in turn, grinned down at her and nodded, to which Lightning immediately went down.
She immediately took the first few inches in like a hooker on a dryspell and started bobbing her head, while simultaneously rubbing her clit with one of her hooves. She slowly increased the speed of her bobbing, hammering the tip into the back of her throat again and again, while also increasing the intensity of her masturbation.
She moaned and groaned from the pleasure, sending constant shivers down the prince's shaft, but when she looked up at him, it seemed that this still wasn't enough. Seeing that her mate wasn't pleased, she increased her ministrations again, using her tongue to lap at the underside of the prince's fuckstick, while also trying to take it down her throat. However, that made her hit erogenous zones she never knew she had - or was it just the heat?
Whatever it was, she felt that something was happening to her. Her pussy was squeezing around something that wasn't there and her whole body would occasionally spasm about. Her nectar was flowing like a waterfall onto her hoof and the bedsheets below her, while she felt a strong pressure build up inside of her.
She let out a muffled cry of surprise as she suddenly felt the prince's magic in her pussy, rubbing her clit and g-spot at the same time. She, in turn, tried to increase her pace yet again, but failed utterly.
She came. Hard. Her whole body convulsed, making her throw her head down and take a third of his dick down her throat in one go. Her pussy was coating the bedsheets beneath her in streak after streak of marecum, while she struggled to stay conscious due to the lack of oxygen.
When her orgasm subsided, she collapsed onto the prince, slowly sliding his dick out of her mouth and immediately taking in as much air as she could. Meanwhile, a new problem presented itself to her. She had come - the prince hadn't. He was still rock hard and was not about to let her go without being satisfied.
Lightning Dust felt that the prince was sliding out from underneath her, before suddenly being yanked face-first into the prince's pillow. Her panting drew in more of the stallion's scent, clouding her mind once again and making her almost miss how the matress around her hind legs was suddenly depressed.
The prince's forehooves landed on either side of her head and one look to her back showed her exactly what she had thought. The prince's hard lance was bobbing directly above her back, sending her a strong message of what he wanted... and she was more than willing to obey.
She raised her rump so that his royal stallionhood rested between her asscheeks and pulled her tail aside. He immediately started rubbing himself on her ass, slightly rocking her back and forth and making her moan into his pillow. However, he refused to put it in yet. Her pussy clenched and squeezed, demanding that something fill the void, but the prince refused to do so.
She turned her head to give a pleading look up to him, which he returned with an almost sadistic look of his own.
"Beg for it." He commanded and Lightning Dust didn't need to be told twice.
"P-Please, my prince, I beg you! Please punish this naughty failure of a mare with your strong, ROYAL Horsecock." She pleaded desperately. "Please, your highness, please use your giant fuckstick to make a howling mess out of this naughty maid."
The prince gave a pleased grin, before slowly sliding backwards and letting his tip flop down to her entrance.
"Well said." He said, as he slowly pushed himself forwards.
Lightning had to restrain herself from howling out as the massive tip breached her tight entrance. Every millimeter he pushed into her, every fold that brushed against his monstercock sent a spike of pleasure through her. She felt every inch of his cock as it slowly sunk into her depths, making her moan into the pillow beneath her.
Her moaning suddenly turned into a surprised cry, when prince Blueblood rammed himself forward, filling the remaining room she had and slamming into her cervix. Looking back, Lightning Dust let out a shocked gasp when she saw that she had only taken half of him in so far.
Without giving her time to prepare. The prince pulled back, her walls clinging to him like they never wanted to let go. Then, when he had freed himself from her grip, he immediately rammed back into her, smashing her face forwards into the pillow and making her grunt in strained pleasure. He repeated the motion, this time quicker and then quicker again end even quicker, until he had worked himself into a quick rhythm of pulling and thrusting that made poor Lightning feel like an anvil under the constant hammering of an experienced blacksmith - and her cervix was the metal.
The prince pounded her like a jackhammer, knocking against her inner wall with every thrust and smashing her face into the pillow, before pulling her back each time he slid out. His balls slapped into her clit each time he thrust inside, giving an extra spike to the cacophony of pleasure she already found herself in. She felt the pressure inside of her build again, but the prince seemed like he wasn't even close. She tried to squeeze him harder to make him cum somehow, but this ultimately also increased the pleasure for herself, driving her even closer to the edge.
Then it happened. The prince did one mighty thrust forward, finally breaching her inner entrance and slamming into the back of her womb. Lightning Dust let out a strained cry, as the strange mixture of pain and pleasure sent her over the edge. Her second orgasm rocked through her body, sending waves of contractions through her pussy , trying to milk the meatpole that stuck inside her of his potent seed.
The prince, however, didn't care about his partner. He pounded on, fucking her through her orgasm and slamming her face into the pillow every time she cried out.
Eventually, her orgasm subsided, leaving the mare a panting, moaning mess. She didn't even notice when the prince turned her onto her back, with his dick still stuck inside her. She was only barely conscious anymore. Her tongue stuck out and her eyes were rolled upwards. All she noticed were the sheer amounts of adulterous pleasure she was subjected to.
Suddenly the door burst open, ripping Lightning Dust out of her haze and sending her into a panic the moment she saw who stood there. Princess Celestia had entered the room, looking at the bed where her nephew and a maid were currently going at it.
Lightning tried to push the prince off of her, but found that he had pinned her hooves over her head. Moreover, he didn't seem to care that they have been found. His pounding didn't stop, forcing moans of pleasure out of her, while her pussy was clenching around the intruder.
"P-Princess Celestia, I - AH! - I can explain, I--" She pleaded, but the princess apparently didn't listen.
"Guard!" She called out.
Lightning's pupils dilated at that, but the prince still didn't seem to care. "No, please, princess! I - AH! AH! - I swear, I don't - Hng! - This wasn't--"
The clanking of armour could be heard outside the door, before a guard reported in. Lightning closed her eyes, involuntarily tightening up around the prince, as she was awaiting the princess to have her thrown out or even worse, sent to the dungeons!
"As soon as my nephew decides to come back from his nightly adventures, tell him that I want him to come to the throne room."
"Yes, your highness!" The guard responded, as Celestia walked past him and closed the door behind her.
Lightning Dust just looked awestruck at the door, before seeing a barely visible dome colapse around them. She looked up to the prince above her, who smirked down to her.
"You are a naughty maid, getting off to being found, by my aunt on top of that!"
"I - no, I-- AH!"
The prince pounded her harder than before, making her let out a long cry of pleasure and tighten up the last bit that she could without ripping herself apart.
Then, she felt it.
Pulsing, throbbing. The prince's dick was sending rhythmic waves into her that told her the one thing that she had tried to accomplish this whole time. He was getting close.
She smiled up at him and closed her hind legs around his waist. "Y-Yes, I - Ah! - I'm a naughty maid. P-lease, my - Hng! - my prince, p-punish this worthless slut! I beg you! Drive your foal inside of me!" She pleaded.
His pounding became frantic, erratic, like a feral animal was he now only out for one thing: breeding the mare beneath him. Lightning felt another spike of pleasure rise up inside of her, just as the prince slammed into her one last time and sent his hot spunk crashing directly into her womb.
She cried out, as the hot liquid sent her over the edge for a third time. Burst after burst of spunk flew inside her, each one prolonging and intensifying her orgasm. Her womb filled up with the white goo to the point of almost bursting, but the prince still seemed to have more.
The pressure rose, soon squeezing small drops of cum past the massive girth of Blueblood's fuckpole and spilling them onto the bedsheets beneath her.
Finally, after what felt like gallons of cum had been deposited inside of her, did the prince finally pull out. The moment he left her confines, a waterfall of foalbatter came crashing out of her abused pussy and onto the stained matress below her. The prince let out a few last spurts which coated her face and belly in streaks of hot cum, before he, finally, had spent all his munition and went flaccid again. He looked at his work and smirked at the result.
Lightning Dust was left a panting mess. She lay splayed out on the prince's bed with her tongue sticking out and her eyes rolled up into her skull. Her coat and face were covered in streaks of white cum, more of which was still dripping out of her wide-open pussy, pulling white lines down her thighs.
Of course, the prince was thoughtful enough to teleport her maid dress away, while they were going at it. After all, he would never allow such a fine piece of clothing to be tarnished by the adulterous drives of a heat-crazed mare. He verified one last time, that the outfit lay folded on the ground beside his bed, before turning around and heading into the bathroom.
Lightning Dust barely registered the sound of the running shower in her haze. All she noticed was the warm streaks that covered her face. She ran her tongue once across them, slurping up the salty liquid, but else didn't move.
When the prince came out of the shower, the maid was still in the same place as he had left her, the only difference he could see being that the white streaks in her face had been smeared and her tongue was now covered in a faint white layer.
The prince ignored these changes for the moment and instead headed towards the door, before speaking to the barely conscious mare. "When you decide to move again, make sure to clean the mess you have made. I will allow you to use my shower this once, but you have to clean it afterwards, understood?"
"Y-Yesh... my prinsh..." The mare slurred.
"Good. I shall go and see now, what my aunt wanted earlier." The prince stated, before opening the door and steping through.
When he was out, his magic grabbed the doorknob and pulled the door after him and then, with one last *click*, the door shut again...
Author's Note
My first full-on clopfic, I hope you like it! 
Interested in the other stuff I do? Or do you want to give me some hints on my writing or generally just want to know what's currently going on? Well, I have a Discord! https://discord.gg/wd3fV9h628 For all those who are interested. You can find all my current projects, as well as the ideas that I have currently floating about listed there and even have the chance to annoy me while I'm writing on my other projects! 
Hope to see ya around!
Also: please tell me if there are any errors that I've overlooked when editing this. thanks! 