A Bet Paid Off

by Hopeful_Ink_Hoof

Rating: mature
Tags: Profanity, Princess Celestia, Sex, Narcotics, Anthro, My Little Pony: Friendship is Magic, Romance, Princess Luna, Porn, Fetish
Length: 4372

After losing a game, Princess Celestia must pay off a bet, in a very public and entertaining manner. Fortunately, she'll get some payback when it's all done

After losing a game to her sister, Princess Celestia has to pay off the bet. The result? Celestia has to grow a dick and masturbate to orgasm in front of everyone during Day Court. However, Celestia has added a condition of her own, one that Luna has to pay herself, and one she is all to willing to do.

This story contains transformation, futa, public masturbation, incest, public sex, cum inflation and risk of pregnancy.

Inspired by a story that was deleted from this site: "Lost Bets"

If you like this, or my other works, feel free to drop a few dollars at my Kofi

(image is #1156524 and has Badgerben and Nonuberis as the artists. No direct link as it is nsfw)

Published 2019-08-21 16:30:02 UTC
Last updated 2019-08-21 16:30:02 UTC

The Pay Off

Princess Celestia sat on her throne, one hand resting against her jaw. Her ears perked forward, shifting occasionally as she listened. She always listened. She had to. Just in case someone tried to slip something past her that was more intended to benefit themselves as opposed to the majority of Equestria.

At the same time, she did not have to pay complete attention. Centuries of day court had left her able to allow her mind to work over multiple other matters while still listening to the petitioners before her.

On this occasion, most of her mind was on the upcoming final hour of court, and what she was supposed to do during.

Princess Celestia's gaze flicked over to the darkest corner of the throne room. There was a faint hint of movement, a tiny twinkling like miniature stars. Unnoticed by the rest of the room, but incredibly obvious to her.

Princess Luna was watching.

Some time between midnight last night and sunrise this morning, the exact time was a bit blurry, the two sisters had been drinking while playing a game of poker. Not for bits, but for bets that the loser would have to perform. As the game progressed and the sisters became more and more inebriated, the two became bolder and raunchier, as did their bets. There had even a bet where Luna had to place an order for food and receive it in the nude, much to the shock -- and likely, delight -- of the staff member who performed the action.

It all culminated into the final bet of the night. The one that Princess Celestia was now about to perform. One that she had agreed to largely because she had been so confident in her hand. That Luna had been bluffing.

Turned out she had not.

Now it was time for Celestia to keep her end.

Although, not without adding a little twist of her own to it. One not even Princess Luna would be expecting. She would have to be very careful about it so.

Her magic power flowed through her, culminating in her horn. She could not keep the glow from it altogether, but she could try to keep it from getting too noticeable. Slowly, slower because of her need to be subtle, the energy built and the spell took form. Once satisfied with the strength and set-up of the whole thing, Celestia released it.

A subtle yellow glow spread throughout the entire throne room, unnoticed by all. As the glow touched everyone in the room, it gave them a small feeling of warmth, but that was not the main purpose. It was actually a spell that Princess Celestia first learned when Equestria was first formed, and there were worries about insufficient population, but had never actually used before. It would increase the amount of sperm produced and encourage ovulation, improving the chances of pregnancy.

With that spell done, Princess Celestia began working on the next. The energy glowed and shimmered around her horn before being turned inward, pouring into herself. It made her skin tingle, and hair of her coat stand on end. She could feel the warmth of her magic sinking into her muscles, flowing back through her before collecting into her lower stomach and crotch.

A new tingle took over as she felt the spell taking effect on her body. It was a strange sensation, feeling her genitals shifting from one gender to the other. Her clit grew wider and pushed forward, becoming the broad, flat head of an equine shaft. The bottom part of her vaginal lips sealed up, the skin stretching out to turn into a sac.

One part of her wanted to reach down immediately, to feel the changes as they occurred, and start playing with herself as it happened. Another wanted to wait, to have the full thing finished and ready before revealing it to the crowd. That way, it would be more of a surprise.

In the end, the more dramatic choice won out. So she sat there, and waited, feeling her penis and scrotum form, but pretending nothing was happening as best she could.

A small gasp escaped from the princess as a pair of testicles slipped into place.

While the cock and balls had fully formed, they continued to grow in size. The shaft grew longer, thicker. The sac swelled as her testicles became larger and larger. It forced her legs to spread wider as she tried to accommodate the increasing bulge. One that quickly became uncomfortable as it pressed against the boundaries of her panties.

With a spark of her magic, the waistband of her panties was snapped, the fabric falling away underneath her.

Princess Celestia reached down with her free hand, and pushed the front panel of her skirt to the side, exposing her now free and still growing male genitalia to all. She spread her legs as wide as she could, the edges of her thighs hitting the armrests. Her hand then slipped underneath the still growing shaft, gripping it gently as she began to stroke along the length.

A gasp filled the room as everyone gathered noticed what the princess was now doing. At least one monocle fell from an eye.

"Your Highness?" asked the current speaker in confusion.

Straightening up, Princess Celestia made a "go on" motion with her hand.

"Continue," she ordered. Her now free hand reached down, and gripped one of her testicles, massaging it as she continued to stroke the growing length.

In her centuries of ruling, there are many things which Princess Celestia has kept secret. Some of them for personal, or political reasons, others simply because they did not seem to matter in a way that was relevant. Still, some of the things she did let slip out or hinted at were often ignored, excused, or explained away. One such example was her clothing. Throughout her rule, Celestia had always worn extremely light and delicate white clothing. They were always sheer, and barely covered more than was necessary. Many ponies had come to the conclusion that this choice was due to what she was and her powers. That the lightness and minimalism of the fabric was on account of her tie to the sun, causing her to be warmer than most.

And while there may have been some truth to that, it was not entirely the case.

In reality, it was mainly because Princess Celestia was an exhibitionist. While there were many things about her position which frustrated her, but having ponies take notice of her was one of the things she did enjoy. She loved showing off her body. From her broad shoulders and wide hips, to her big breasts and bubble butt, with everything in between. Having so much bare skin shown off, and having all eyes on her sent a thrill through her.

One that, admittedly, had diminished over the years, if only because it was something that she had done constantly.

There had been times, early on, when she had considered holding court naked, or even actively masturbating in front of everyone. Unfortunately, it was necessary for her to be seen as a figure of power and authority both for her own citizenry, and to the neighboring countries around her. As such, while she had loosened up and done other less "proper" things over the millennium, that had been one she never acted on.

However, as Luna pointed out when making the bet, the two of them were retiring soon. As such, there was no need to worry about decorum as much. After all, they were already intending to step down from their positions, and Twilight had proven herself... mostly capable of handling the responsibilities of ruling. She had definitely proven herself capable of handling any outside threats. As such, there was no real reason for Princess Celestia to not indulge herself in such a way.

Although, while she had given herself a dick to play with in the past, it had never occurred to her to actually masturbate in public with one. She had to give her sister credit for that.

Releasing her grip on her genitals, Princess slid forward, letting her testicles (now the size of cantaloupes) hang over the edge of the seat. Her hands reached down to her waist to undo the belt, then up to her neck to undo the collar. The only things keeping her dress on now undone, she pulled it off and tossed it aside, now completely naked for all to see.

The shock of what was happening wore off enough that the crowd began talking again.

"What in Equestria..."

"...most inappropriate..."

"... not how a princess should behave!"

Yet none dared to speak up to Celestia herself, nor did any of them try to leave (not that anyone would stop them: they were all perfectly allowed to do so whenever they wished). Instead, they stayed where they were, watching the now naked princess.

While she could not see it from her position, it was easy for her to imagine they were aroused as well. Cocks getting hard and erect, pressing against the front of their pants, and pussies dripping wet with arousal, soaking the underwear and dripping down the thighs.

Once more gripping her erect shaft, Princess Celestia pulled it toward her, nesting it between her breasts. Her shoulders hunched forward, pressing the soft mounds against the rock-hard length. With it being too thick for her to wrap her hands around entirely, she gripped at the base with one hand and just under the head with the other, squeezing and massaging the spots. Celestia's pink eyes stared at the crowd as she craned her neck, bringing her mouth toward the tip. Slipping her tongue out, she ran it along the edge of the crown.

A golf ball sized glob of pre built up from the opening. At first, Celestia considered licking it up. Maybe letting it drip from her tongue and back onto the head. Instead, she grabbed the pre, coating her hands in it, and stroking down along the length. The underside became coated in the fluid, lubricating it from the head to the medial ring.

With that done, she really went to work. Gripping the shaft with both hands, she gave it a firm squeeze and pumped as quick as she could from ring to tip and back. Her eyes closed as she pictured a single fantasy in her mind. One that she was hoping of making come true before the end of the day.

Moans and pants of pleasure escaped the princess as she enjoyed herself. Her hips rose from the throne before falling down again as she pumped them. The urgency built in her core, coiling tighter and tighter as she sped up.

Princess Celestia cried out, wings flaring out behind her, as she reached her limit. The shaft swelled and twitched as basketball sized testicles released their contents. Rope after rope of semen exploded from the tip, spraying all over the room, and coating everything in seed.

As the pleasure of her climax subsided, she wiped the cum off her face and opened her eyes.

Many of the ponies in the gallery had at some point let their own lustful desires take over. One mare was on her knees in front of a stallion, stroking the shaft as she licked at the tip. Another mare was wiping the cum from her coat and then stuffing it up into her pussy. It made Celestia wonder if she was going to have an illegitimate child out there in a year or so. A different couple was trying to be more discreet. They had kept their clothes on, but each had a hand down the front pants of the other.

The guards still stood in position, looking unmoved even as semen dripped from their armor. At least one of them had to be feeling some discomfort, however, considering how ungiving the armor was. Codpieces included.

Perhaps she could help with that.

"Guards," Princess Celestia called out. "Consider yourselves officially off-duty. If you wish, you may leave, or assist any in the gallery who may want such."

Not waiting to see which they would do or how it would go for those that tried to approach the horny nobles, and with nothing else to distract her, she turned her full attention to the one thing she wanted to give it to: her sister.

Princess Luna's horn glowed with magic. Next to her was a construct made of her energy, shaped like a funnel leading into a bowl, which was currently filled with copious amounts of Celestia's semen. The younger princess had shed her own dress, and either took the underwear with it, or had not been wearing any. She was reaching into the bowl with both hands, scooping up the contents and bringing it to her mouth. The semen would flow past her lips, with most running down her neck and onto her chest. That and what remained in her hands would then be rubbed into her breasts and even down her stomach to just above her sex.

Celestia reached out with her own magic and grabbed her little sister. Luna let out a yelp of surprise as she was levitated, her own magic losing focus. The funnel and bowl vanished, its contents splattering against the floor wetly.

"Sister," Luna cried out as she was brought up to the throne, "what is the meaning of this?"

"Well I held up my end of the bargain," Celestia answered as she set Luna down gently. The older sister gripped her shaft with one hand, holding it upright, while the other slid down along her breasts and stomach. "And I thought that perhaps you would like to help me clean up after now."

Luna stared at her sister's cock and cum-covered body, blue eyes wide. Her tongue slipped out, licking her dark lips as she gave a nod.

"Certainly," she said as she moved closer. "It was my bet, which means it is only fair I help clean up, after all." Reaching out, she took a hold of her sister's shaft and massaged the base. Luna closed her eyes as she leaned forward, bringing her mouth toward the head. Her mouth opened wide as she stuck her tongue out, licking up the globs of semen that were still on top. Raising her head, Luna showed Celestia her cum covered tongue.

She closed her mouth, swallowed, and opened it again to reveal it was gone.

After her little show, Princess Luna returned her attention to the shaft, licking her way down along the underside. Her body pressed against it, sliding down along the length as she moved lower and lower.

Celestia shifted to get comfortable, one hand reaching up to squeeze her and massage her breast. She watched her sister's performance, enjoying the feel of the ministrations to her cock. It was a little disappointing there was no way to watch from other angles at the same time. She would love to watch Luna's ass as it stuck out, moving up and down, or to see those nether lips part between spread thighs, a flash of pink surrounded by dark blue.

A small voice in the back of her head reminded her that there was a mirror pool not far from Ponyville. With that, she could create a clone of herself to enjoy things. Alternatively, Twilight had mentioned Starlight coming up with a combination of spells that could allow someone to be in two places simultaneously.

Thoughts of having group sex with Luna and multiple versions of herself were quickly pushed aside as she felt hands on her sac, massaging the contents. It was soon followed by Luna's snout, nose pressing against the base of the thick equine shaft as she took a deep breath.

Luna let out a purr as she nuzzled against her sister's cock.

"Such an alluring aroma."

She nuzzled against it more, coating her nose, lips and chin in the remnants of the thick white fluid. Her tongue slipped out, grabbing another glob and swallowing.

Opening her mouth, Luna leaned in and took a hold of the skin between her lips. She let out a hum, sending vibrations through her sister's genitals, and tingles of pleasure through her entire body. She sucked on the skin, being careful not to bite down with her teeth, and gave it a firm tug.

The skin pulled free of her grasp with a wet pop, glistening with saliva.

Back at full arousal, Princess Celestia decided she had gone through enough foreplay. With her magic, she grabbed her sister, getting a little yelp of surprise in the process. Celestia floated Luna up off the ground and onto her lap, setting Luna down so that those firm, dark, butt cheeks nestled against the erect length. Reaching down, Celestia grabbed her sister's hips, holding her in place, and started to rock her hips, grinding the shaft against that ass. Leaning up, the older sister pressed her body against the younger, while bringing her mouth to Luna's ear.

"I cast a fertility spell on everyone in this room," Princess Celestia whispered. "Including you." Her hips rocked, rubbing her length along her sister and leaving a trail of pre. "So if you want to stop, you can teleport away right now." She pulled back, putting space between her dick and Luna's body. "Otherwise, I'm going to breed you, right here, right now, for all to see."

Celestia leaned back, looking her sister in the eye.

"So, what shall it be?"

In response, Luna's horn lit up, taking a hold of the shaft. Lifting her hips, she lined her the tip of the shaft up with her nether lips.

A gasp escaped her as she was penetrated, wings flaring out wide.

"Yes," Luna hissed out as she continued to push down. "Do it, Sister. Fill me with your seed. Impregnate me." She then looked Celestia in the eye. Her own narrowed as she smirked. "And know that once it is born, I shall return the favor."

Celestia's eyes closed as she gritted her teeth in pleasure. Her sister's pussy was so warm, so wet, and so tight. She could feel the soft muscles engulfing it. Squeezing it. Caressing it. The thoughts of filling those depths with her seed, of impregnating Luna, of her sister's belly swollen with growing life and breasts leaking nourishing milk, was all very exciting.

And the idea of being on the receiving end, of being in such a state herself, was quite thrilling.

But it was one that would have to wait. At least for a year.

In the present, Princess Luna gave one last downward thrust, butt and thighs slapping against hips as she took the entirety of her sister's cock. Her legs and wings twitched in pleasure as she rested on her sister's lap, feeling the entirety in her. It was a perfect fit. Long enough for the tip to just touch the cervix, and thick enough to stretch the walls a little.

Celestia's fingers dug into the arms of her throne, leaving dents in the metal. Her length twitched with excitement inside its warm sheath. As the initial excitement passed, she pried her grip free of the arm rests and took a hold of her sister's hips.

As soon as she was grabbed, Princess Luna braced herself, and started moving. Her hands reached out to grip the arm rests, supporting her as she lifted her hips. She did so slowly, letting the length slip out little by little. Her movement stopped just before the medial ring could slip free. Luna's eyes narrowed as a teasing smirk formed on her face. She clenched her inner muscles, squeezing around the still captured piece of dick.

Princess Celestia's jaw clenched tight as let out a predatory growl. The teasing, the slowness, it was agonizing. She wanted to thrust up hard. To pull her sister down. To pound away until they both were too drunk on the pleasure of sex to think about anything at all.

Except she could not.

Princess Luna may have been smaller than her sister, but she was still taller than most stallions. The same could be said about her physical strength. As such, if it came down to a fight solely of physical ability, she would lose to her older sister. Fortunately, Luna knew this, and had come up with ways to make things more in her favor.

And Luna had all the leverage. She could put her entire body into what she was doing. Meanwhile, between Luna and the throne, Celestia's movement was limited. Celestia could not do anything without Luna letting her, and Luna was not letting her.

After an eternity to Celestia, Luna relaxed her vaginal grip and slid down, once more taking the entirety of her sister's lengths into her body. This time, she did not stop before raising up again. As before, she stopped at the ring before dropping back down.

With each downward thrust, Luna picked up the pace. She would lift herself up and lower herself faster and faster, bringing her entire body down onto her sister's lap. Her ample breasts bounced with each movement, jiggling as she slapped down. She threw her head back, eyes closing and mouth hanging open.

Celestia watched Luna's breasts bounce and jiggle, watching the dark nipples move. She slid her hands down and around, gripping the toned cheeks of her sister's rump and giving a squeeze. Her own hips moved counter to Luna's, thrusting up to bury her length deep before pulling back again. Each thrust got a small grunt of pleasure from her sister. A noise that dove Celestia on more and more.

As she continued to thrust, Celestia felt the building tension in her shaft and balls, warning her that she was getting close. Letting go of that sexy ass, she grabbed Luna's hip in one hand, and her neck in the other. The older princess pulled the younger one down hard, burying the entire length in the warm tightness to the base. At the same time, she leaned forward while pulling Luna closer, pressing their mouths together.

Celestia's cock swelled with its climax, locking her deep inside her sister's pussy. The length swelled and pulsed as it unleashed shot after shot of thick, fertile cum, pumping it directly into the waiting, wanting, and fertile womb.

The feeling of being filled and stretched set Luna off into her own orgasm. Her walls clamped down hard, squeezing the length and pumping every drop of potent seed into her. She tried to cry out in pleasure, but was cut off by her sister's mouth pressed against hers, tongue sliding in to play across her own. Luna found herself returning the action without thinking. All that she could think of was the pleasure going through her, of the seed filling her and the cock stretching her. Of being claimed and bred.

Celestia's hips continued to push up and grind, trying to get every drop as deep into the waiting broodmare as it could. As the orgasm finally began to slow, she broke the kiss, flopping back against her throne and panting heavily.

Her eyes went wide at the sight before her. She had been aware that the spell had made her quite productive, but had not been expecting to actually see the results of it. The sheer volume of it all had caused her sister's abdomen to swell and stretch, making her look like she was already pregnant, and well along in it at that. It caused her length to give an extra pulse, like it wanted to guarantee what Celestia saw came true.

As her climax subsided, Princess Luna went limp, collapsing against her sister. She panted as she laid there, a thin layer of sweat sticking to her coat.

"That," she panted out, "was quite pleasure."

Celestia grinned, shifting to run a hand through her sister's hair.

"We're far from done," she said.

The sound of a throat clearing got the pair's attention. The princesses turned to find Celestia's assistant, Raven Inkwell. The normally well-dressed unicorn mare was naked, cum streaking her luxurious black mane, and running down the inside of her milky white thighs. Her glasses rested on her snout, and were perfectly immaculate.

"Forgive the interruption," Raven stated. "However, it is nearly time to lower the sun and raise the moon. With all due respect, it would be best not to cause a panic by failing to do so on schedule."

Princess Celestia let out a sigh, and gave a nod.

"You're right, Raven," she said.

She gave her sister's butt a gentle pat.

"Come on, Luna. We can continue after we have completed our tasks." Celestia gave a small smirk. "Perhaps we can even continue on the balcony."

Princess Luna gave a smile back before moving to get up. Slowly she lifted herself from her sister's cock, letting it slip free. There was a moment of resistance as the head gripped at the walls, before finally slipping free with a loud, wet POP! A small bit of seed dripped from her well-stretched sex, plopping onto the red carpet leading to the throne.

"And what of them?" Raven asked, motion toward the gallery.

Essentially an orgy had broken out. All those assembled were in various states of undress, from just exposing their genitals to having gotten completely naked. Cocks were being stroked, sucked, and ridden. Pussies were being fingered, licked, or fucked, and the same could be said with asses, regardless of gender. Breasts were being fondled, suckled, or humped. Everyone involved had at least some bit of fluid on their coats.

"Allow them to finish," Princess Celestia stated as she stood up. "Once they do so, allow any who wish it access to the baths and a room for the night. Have the cleaning staff paid double for the work required to clean it all up."

After getting a nod from Raven, Celestia placed her hand on her sister's back and guided her to the door. They still had a duty to perform, after all.

And hours of sex to have afterwards.