Author's Note

This chapter was inspired by JetChicken's comment.

Chapter contains: cuckolding, wife sharing, (self) humiliation, cum guzzling and a predictable ending.

Bonus chapter n°1: Cake Batter

Music and laughter could be heard from beyond the door, making Celestia’s ear twitch. She had been hesitating in front of Sugar Cube corner for some time now, her hoof frozen on the doorknob. A few days ago she had been thrilled when she had received the invitation for Cadance and Shining’s baby shower in Ponyville, but now she couldn’t help but feel some trepidation: after all, in the room would be two mares she had bedded and impregnated, one with the consent of her husband, one behind his back.

She felt both exhilarated and terrified.

She heard one of her royal guards cough behind her, and a quick look around made her realize she was making a spectacle of herself, ponies already gathering to watch her do her best statue impersonation. She sighed, put on her regal mask, and finally pushed inside with a firm step, leaving her royal chariot and pegasi escort outside. She entered the room with the dignified grace expected of her, a kind smile on her muzzle, and the whole assembly turned to greet her.

Twilight was the first to reach her, of course, the small alicorn rushing to receive her usual loving hug. Celestia nuzzled her former student eagerly, her fake smile slipping into a genuine grin of fondness, her snuggling becoming a little more affectionate than usual; she was feeling very motherly at the moment. Twilight had no complaints, her wings fluttering like an excited baby bird as she basked in her maternal nuzzles, and she gave a little whine of disappointment when Celestia stopped to greet the other guests.

The room was filled with familiar faces, so Celestia didn’t have to bear the usual groveling of her subjects, but they still bowed respectfully, much to her chagrin; it only showed how much distance still separated them. However, there was one couple of common ponies that didn’t bow to her. The Cakes smiled affectionately, waving from behind the counter, a soft blush spreading to Cup Cake’s cheeks. Celestia sent them a warm smile, then turned to the center of the celebration.

“Cadance, Shining Armor, congratulations!”

Celestia didn’t have to fake her happy tone as she toasted the future parents, but she did have to fight a pang of guilt when she looked at Shining Armor. She almost looked down when the unicorn stallion responded, gushing about how excited he was to be a dad, but her attention was diverted to the pink alicorn standing next to him. Celestia’s mouth went through the motions, exchanging platitudes with the soon-to-be dad on auto-pilot, but her eyes were riveted to Cadance’s form.

It was much too soon for Cadance’s pregnancy to show, but the knowledge that she was carrying her foal made Celestia’s heart race. She distractedly noted that Shining had stopped prattling on, so she went on with her congratulatory speech for the future mother, all the while daydreaming about the evening she had spent breeding her. She didn’t realize her stallionhood had slipped free of her sheath until it swung against her leg, but she didn’t pay it any mind: it was still invisible after all. So she finished her little speech wishing all the best lucks to the happy couple with her cock out, the shaft gradually becoming harder as she thought about throwing Cadance on a table and rutting her senseless on a bed of pastries.

Once she had finished the assembly exploded into cheers, clapping and stomping, and she took the occasion to let her stallionhood slap against her belly, the loud fleshy sound lost in the ovation , a few drops of precum dripping to the floor. Cadance’s ears twitched, her nostrils flaring, and a small frown appeared on her muzzle. The alicorn leveled an accusing stare at Celestia, her eyes flicking towards her underside accusingly; apparently Cadance’s senses were very sharp, at least when it came to anything sexual. Celestia responded with an imploring gaze, her chin discretely pointing towards the stairs leading up, towards the Cake’s bedroom. Cadance shook her head categorically, much to Celestia’s frustration.

Soon enough the party was in full swing once more: music was played, ponies danced, a piñata was gutted, and Celestia’s cock throbbed at full mast. The solar princess conversed with her little ponies, holding her serene smile while her member raged on underneath, her eyes compulsively seeking Cadance, focusing on her shapely rear. Celestia had to cough to disguise the sounds of her stallionhood hitting her belly, so much so that Twilight had rushed out to get her some throat medicine despite Celestia’s assurance that she was alright. She had never had such issues when it came to controlling her urges before, she felt like an addict, drunk on Cadance’s presence. When her tip started to leak precum in dangerous amounts, Celestia knew she had to do something before somepony slipped on the slimy trail she was leaving on the wooden floor. Celestia excused herself from the group of smiling ponies, careful not to let her cock bump into anypony as she made her way to Cadance.

Celestia smiled as Shining raised a cup of cider at her approach, the stallion apparently more than a little tipsy already, his wife watching her with a suspicious glare. The flushed unicorn thanked Celestia with all his heart for the supposed spell she had used to help Cadance conceive, throwing his hooves around her slender neck in a exuberant hug, before encouraging his wife to do the same. Cadance rolled her eyes, before giving Celestia a begrudging hug, careful to stay away from her invisible stallionhood. Celestia’s nostrils flared, Cadance’s flowery scent invading her mind, and she pressed her lips to her pink ear, whispering urgently. “Cadance, I need to mate with you.” Celestia urged. “Please, I cannot stop thinking about that evening, I need you…”

Cadance giggled as if she was being told a juicy piece of gossip, then she leaned into Celestia’s ear. “No.” Was all she said, before stepping away to get more cake.

Celestia watched her pink foal-bearing hips swaying away, Cadance’s tail firmly pressed against her nethers in a clear sign of denial. Celestia gave a soft whinny of despair, her cock suddenly bouncing angrily against her belly, the slap loud enough to make Shining Armor flinch.

“What wazzat?” He slurred, looking around drunkenly.

“A balloon was overfilled and popped.” Celestia grunted, feeling her balls brimming with seed; she was not used to being blue balled in this manner. From the corner of her eye she saw a flash of blue, and she turned to see Mrs. Cake’s plump rear disappearing in the kitchen, her cock springing up at the sight. “Oh, there goes another one.”

She left the confused stallion behind, her hooves just a tad too hurried as she made her way to the counter, and the baker that could grant her relief. Mr. Cake looked up from the platter of cupcakes he was frosting, a warm smile appearing on his square muzzle when he saw who it was.

“Princess.” He nodded respectfully, his friendly grin betraying how comfortable he felt around her compared to others.

“Carrot.” Celestia greeted, her mind flashing back to the night she had spent with the Cakes, her flanks trembling at the memory. “How are the twins?”

“Healthy as can be, the fever I told you about in my last letter cleared right up, they are probably wrecking the daycare as we speak! Oh, and thank you for sending that magic proof crib by the way. Our little Pumpkin’s magic is incredible for her age.” Carrot Cake chuckled, leaning forward to whisper in confidence. “Which is to be expected, considering her biological father, hmm?” He winked at her, before gesturing to the plate. “Care for a cupcake?”

Celestia looked at the platter; the pastries looked delicious, but she had a different kind of hunger. “Yes,” She said pleasantly, looking the stallion in the eyes. “but I’d like to have your Cup Cake instead.” The stallion tilted his head, confused. “The Cup Cake currently in your kitchen.” Another tilt. “The one you are married to.” It was like talking to an owl. She sighed, then decided she was too aroused to play any more games. “Carrot, will you allow me to mate with your wife again?”

Mr. Cake’s head jerked back, surprised, and his eyes shifted around to make sure no one had heard. “What… right now?”

“Yes.” Celestia nodded, her cock bobbing under her in agreement. “I need some… help.” She punctuated her statement with a slap, and the stallion understood her predicament, his eyes widening. “… Please, it’s urgent.”

Mr. Cake looked back at the kitchen, from where the sound of a mixer could be heard, then he turned back to Celestia. “… Can I still watch?”

“Of course.” Celestia nodded eagerly.

Carrot Cake grinned, then rushed into the kitchen. Celestia heard him talking to his wife, the sound of baking stopped, and Carrot came back with a large smile.

“Pinkie Pie!” He called, prancing in excitement. Pinkie perked up from the other side of the room, her mouth full of cake. “Can you take care of the service for a little while, we need to go buy something. It won’t take long, just…” He looked at Celestia, the alicorn thinking for a few moments, evaluating how backed up she was, before mouthing a number. “Just 10 minutes!”

“Okie dokie lokie!” Pinkie Pie shouted back happily, her demeanor changing from party guest to hostess instantly.

“I’ll help you.” Celestia said out loud, her horn shining. “Now where do you need to go, I’ll teleport us there.” She was sure her little act would fool the ponies around, but from the corner of her eye she saw Cadance give her a deadpan look that screamed “Really?” She ignored her, flipping her tail at her, and followed Carrot Cake in the kitchen.

Cup Cake was hurriedly trying to dust herself from all the flour clinging to her fur, a timid smile gracing her lips when she saw Celestia approach. She opened her mouth to say something, but Celestia was too impatient, and her horn flared up with a golden flash.

They reappeared in the Cake’s bedroom, the room looking exactly how she remembered it, so she had not issue teleporting everyone in their places: Carrot huffed as he was dropped on the bed and Cup squeaked as she found herself propped up on the edge of the covers, just at the right height for Celestia to mount her. Celestia snorted as she let the spell hiding her cock fall apart, a gasp escaping Carrot’s lips as he watched her twitching length appear; she certainly wasn’t kidding when she had said it was urgent, her stallionhood looked ready to burst already.

“N-Now…” Cup stammered, looking back at the alicorn carefully. “Hmm, we don’t have any condoms, so please remember to… EEK!” The mare squealed as Celestia reared up over her, the much bigger alicorn dwarfing the plump baker. Celestia had to kneel on the bed to be able to press her barrel to Cup’s back, her hind-legs still standing on the floor, and she shuffled forward impatiently. “Re-remember to P-PULL OUT!” Cup Cake cried out as Celestia unceremoniously rammed her massive cock into her marehood, a powerful burst of precum spurting from her tip just as she penetrated, giving her all the lubrication she needed to bottom out in one thrust. Cup’s eyes widened in fear. “W… wait, did she just…”

“It’s just pre, don’t worry dear…” Carrot cut her off, his eyes locked onto the rivers of slimy liquid running down his wife’s thighs, escaping around Celestia’s cock. His hooves were already busy jerking his hardening stallionhood, a part of his mind noting how ridiculously small he looked next to Celestia’s pole. His cock throbbed at the thought, quickly growing to full mast, bigger than the average stallion, but still nothing compared to the alicorn he had surrendered his wife to.

Celestia sighed in relief, staying still for a minute to savor the middle aged mare’s insides, her cock throbbing happily as it released precum in a constant stream. Cup was not very tight, certainly nowhere as tight as Cadance, but it only made it easier to thrust into her plump backside, her soft walls rippling along her length. About a third of Celestia’s cock was sitting outside of her mate, but with her stallionhood’s tip snugly pressed against Cup’s deepest barrier, she had nowhere to sink into anymore. Celestia’s hind-hooves shuffled against the wood floor, adjusting her hips, and she gave Carrot a questioning look. The stallion’s hooves were a blur, his breath already short; he knew he didn’t have much time to get off after all. He saw Celestia’s gaze, and nodded earnestly. Celestia grinned, and her hips suddenly lurched back.

Cup Cake mewled in distress as she was dragged to the edge of the bed as Celestia’s already hard flare scrapped against her walls, only to squeal in pleasure when the princess rammed her cock back into her just as it was about to leave her sloppy insides, a shower of precum escaping around her loose cunt. Celestia’s flare battered against Cup’s cervix, a spurt of stallion arousal spraying into her womb, a thrill of fear coursing through Cup’s body, making her marehood spasm. Celestia snorted loudly, wishing she could sink her cock to the hilt, but there was only one mare that could take her fully. And that mare now refused her after giving her a taste of heaven. It was infuriating, and she took out her frustration on the mare underneath her, her hips drawing back for the next thrust.

Carrot watched with baited breath, his cock leaking a few dollops of thin precum as he watched the rivers of slimy alicorn arousal oozing from his wife’s stretched pussy. He tried to match Celestia’s rhythm, his hooves stroking his shaft in time with her rough pounding, but Celestia’s hips were soon lost in a blur, and he couldn’t keep up with her. He unashamedly enjoyed hearing Cup squealing in pleasure, his body jostled by the shaking of the bed, its frame groaning as Celestia fucked his wife like a wild animal. If there was one thing that he enjoyed most, it was watching another stallion ravage his wife, but he was usually secure in the fact that Cup was sterile, so there was no risk in their libertine activities. It was not the case with Celestia. With the alicorn, the risk was great, and it only served to aid his fantasies of watching a superior male breed his wife while he watched on, helplessly.

Mrs. Cake pressed her flour covered hooves against her muzzle to avoid moaning out loud, Celestia filling her pussy like no stallion could. It had been some time since they had found somepony willing to do this with them, and her orgasm was already looming close. She felt completely subjugated, her usually large frame easily obscured by the big and virile alicorn hunched over her, pounding into her like she owned her. Cup shot her husband a look, but Carrot’s eyes were focused on Celestia’s massive cock, his gaze following her thrusts, his awed expression making it clear how inferior he felt. She grinned, staring at her cuckold of a husband, so ready to surrender his wife to a superior male, so keen on watching her get railed and bred like a whore… Cup buried her head into the covers to smother her screams of pleasure, the sight of her husband’s pathetic expression pushing her over the edge. Her body convulsed, her pussy contracting over the thrusting length, begging for mercy, but the alicorn kept on fucking her steadily, uncaring.

Celestia was fast approaching her limit, and she did nothing to stop the oncoming tide. This was not making love, this wasn’t the loving embrace of a loving couple. This was simple animalistic rutting, the only thing that mattered was taking her pleasure, and emptying her overfilled balls. So she picked up the pace, much to Cup Cake’s obvious –and loud– enjoyment, her blunt head bottoming into the poor baker without restraint. Celestia’s swollen ballsack swung with every thrust, the heavy orbs slapping against Celestia’s plump teats, her mounds squished snugly around her own cock. Celestia’s flare quickly expanded to its full girth, Mrs. Cake soft walls wielding to its huge size.

Carrot’s eyes were wide as dinner plates as he saw his wife’s stomach bulge out with the shape of Celestia’s tip, the outline of her cockhead clearly visible despite his wife’s chubby belly. He gave a desperate moan, his hooves' jerking motions reaching a forever pitch, and he felt his balls jump against his thighs. He grunted like a dog as the first rope of semen sprayed from his tip, a large satisfied smile spreading on his muzzle… Until he saw where his release was going to land. He gave a terrified squeak as his cum splattered against Celestia’s neck, smearing her pristine white coat with his inferior seed. The alicorn startled, distracted from her frantic pounding –though she didn’t stop railing her squealing mate– and she turned her head just in time to receive a second volley of stallion spunk across her muzzle. Mr. Cake almost fainted right then, watching his semen dribbling all over his ruler’s face, sullying her coat.

Celestia blinked in surprise, cum clinging to her eyelashes, wondering why the timid and submissive Carrot Cake had decided to make the bold move of marking her with his seed –not that she minded– but a look into his frozen face told it all. It was an accident, and the poor stallion was probably thinking he was about to get smited or mooned for his transgression. Celestia rolled her eyes, then leaned her head towards the petrified stallion, all the while pounding into his wife. Carrot flinched back, afraid he had stepped over the line, and the fear only made his third emission that much stronger. He tried to aim his cock away from the looming alicorn, but before he could fire his spunk all over the bed sheets, Celestia took his cock into her mouth with an eager *slurp*.

Carrot stood frozen in shock as his seed splattered into Celestia’s mouth, her tongue lapping at his tip, humming as she savored his release. When the surge tapered out, Celestia looked up at him with a seductive glance, her eyes half lidded. She sucked on his cock enthusiastically, an encouraging smile on her lips, and Carrot understood: she wanted more, and he was only too eager to serve. He threw his head back, his back arching as he spilled more and more into Celestia’s waiting mouth, her magic swirling around his balls to help them empty their load into her gullet. Celestia’s cheeks bulged out as she kept suckling on his spurting cock without swallowing, and she leaned back when her mouth was completely full. Carrot groaned as he fired his last shots, this time willingly aiming for Celestia's body, ropes of cum landing on her sides, before he collapsed on the bed, completely spent.

With a mouth full of stallion cream, Celestia’s mind slipped into pure lust. Her thrusting lost the graceful rhythm she had kept until then, becoming forceful and urgent, her hips pounding into Mrs. Cake with obvious intent. Mrs. Cake felt the change of pace through her own orgasm, and she took a fearful look at the alicorn looming above her. Celestia’s face was twisted with pleasure, lewd moans escaping her throat as she slowly gulped down her husband’s cum.

“P-princess?” Cup Cake managed to blurt out between thrusts. “Pu-pull out please…”

Celestia didn’t acknowledge the request, too busy swallowing and ramming her hips forward. Her cock was throbbing dangerously, on the verge of spilling her seed into the plump baker.

“Princess!” Cup said urgently, but to no avail. She tried to crawl away, but an imperious white leg hooked around her shoulder, keeping her still. “No, don’t cum inside please!” No response. “ Celestia!”

Hearing her name finally brought her back down from her high, and Celestia’s hips slowed, before finally stopping with one last thrust. Celestia gulped the last of Carrot’s release, the alicorn remaining as she was, bottomed out inside her mate, panting like a dog. She felt her cock twitch, much to Cup Cake’s terror, but she had it under control. Celestia inhaled deeply, willing her raging balls to subside, and she carefully pushed away her feral instincts that were clamoring for her to spill her seed into this mare, and put another foal or two into her belly. She sighed, then started to pull out.

“Is someone in there?”

Everyone in the room froze, not daring to even breathe. All three gazes turned towards the bedroom door, and Pinkie Pie’s voice reached them once more.

“I swear I heard some strange noises…” Pinkie muttered, obviously afraid they were being robbed. “Hey mister burglar, if you’re in there, please don’t do anything mean okay?”

To their collective horror, the doorknob started to turn, and the door cracked open. Cup Cake recoiled under Celestia’s frame, instinctually trying to hide, and she unwittingly sank back into the princess’ cock. Both Cup and Celestia flinched in surprise when they felt hard flare meet cervix, and Celestia could do nothing as her traitorous balls took the occasion to release their packed sperm in a rush. Cup inhaled sharply as she felt Celestia’s cock swell, her walls clamping down in fear, making it impossible for Celestia to pull out.

Celestia and Mrs. Cake remained perfectly still, frozen in shock, eyes glued to the opening door as Celestia’s cum rushed down her shaft. Cup only gave a distressed little mewl when her womb was bathed in an urgent spray of thick semen, her body instantly responding to Celestia’s magic, becoming fertile and ready to accept her virile seed. Celestia valiantly tried to pull out despite her body roaring in approval, but Mrs. Cake was holding on too tightly, her usually loosened cunt contracted in fear. Celestia’s mind went blank from pure animal satisfaction, and she gave up on trying to hold back, hunching over her mate as she poured her baby batter into the married mare, surely impregnating her for a second time.

Carrot held a shell-shocked expression as he watched Celestia breed his wife, his eyes glued to the length sitting outside of Cup, surges of thick semen clearly visible as they bulged down her shaft endlessly. Each mighty throb on its own surpassed his meager production, and he could practically hear Celestia’s seed pouring into the depths of his wife’s womb, stuffing her like a pastry. He didn’t even care that the door was almost open. He only had eyes for the virile alicorn claiming his wife, Celestia holding Cup possessively, staking her claim over his wife, turning her into a broodmare to carry her foals over and over again. His cock jerked weakly in surrender, a pitiful squirt of cum leaking on the bed sheets, where it belonged.

The light coming from the doorway was almost upon the coupling ponies, when a second voice came from the other side.

“Pinkie, you’re needed downstairs.”

Celestia’s body seized as she heard that voice, her cock suddenly growing and her balls swelling with extra dense semen, just because of Cadance’s presence. Mrs. Cake grunted quietly, her small body unable to contain Celestia’s lust, a shower of cum escaping from her cunt.

“But… Do you hear that? Sounds like something’s leaking!”

“I’ll take care of it Pinkie, don’t worry.”

“Well... Okay!”

Pinkie’s happy hoovesteps quickly went away, much to their collective relief. Celestia Finally managed to pull her cock from Mrs. Cake’s clenching pussy, her spurting shaft slapping against her plump rear, glazing over the poor baker in a thick layer of gooey frosting. Carrot whimpered as her wife was marked in the most primal way, and he knew Celestia’s scent would cling to his wife’s coat, reminding him of who she belonged to; he spontaneously came from the thought alone, weak spurts splattering on his chest, his high-pitched whiny echoing around the room.

There was a startled silence from the other side of the half-opened door, and Celestia was sure the scent of her cum must have been reaching Cadance’s delicate nose by now. There was no way the pink alicorn wouldn’t know what they were doing, and Celestia caught herself hoping she would join them. Cadance seemed to hesitate on the other side of the door for a few instants, stocking Celestia’s hopes up, before they heard her sigh loudly.

“I have a pretty good idea of what’s going on in there.” Her azure magic took hold of the doorknob, and the Cakes flinched in fear. “Celestia, you know that if you get busted we will be in trouble, so if you really can’t control yourself, next time come to me. I’ll take care of you.”

Cadance then closed the door, leaving the three ponies inside stunned. Celestia’s thoughts swirled around as she took in Cadance’s promise, while the Cakes looked at each other as they processed the Love Princess’ words, and the consequences from the alicorn seed still dribbling from Cup’s overfilled womb. The trio remained silent, lost in thought, until the low sound of creaking wood startled them. They looked down, feeling the bed groaning under them, like a tree about to fall.

“Uh oh…”

*******************

Cadance’s ears twitched a she heard a loud snapping sound, followed by three squealing voices and a *thud*. She paused for a second, then kept going down the stairs, ignoring the strange sounds coming from the bedroom. She didn’t know what sort of kinky fetishes the Cakes were into, and she didn’t care. All she cared about was the fact that Celestia had acted in such a blatant and careless fashion, in stark contrast with the way the Solar Princess usually acted; her little romp with the Cakes could have put her own marriage in serious peril. She shuddered to think what would happen if Shining found out about Celestia’s gift; he wouldn’t take long to connect the dots with her own impromptu visit to Canterlot, only to announce she was pregnant mere days later, saying she had received help from Celestia.

She didn’t have a choice: if Celestia was so obsessed with her that she forgot all caution and risked revealing her secret just to get off, she had to give in, if only a little. She had made her decision when she reached the main floor, and she gave Pinkie a reassuring shake of her head; everything was fine. She then smiled as a drunk Shining Armor stumbled over to give her a loving hug, and she returned the gesture fiercely, holding on to him possessively. He was her stallion, her Shining, and she would do anything to keep him.

Anything.