[Hyper Cock, Hyper Insertion, Cumflation]

"You wanted to see me, Baobhan Sith? It's not often that you call for me..."

"Indeed I did, Barghest. There's something I would like to try, to test out the true strength still brimming inside you. Not that of the Calamity, but something more... potent."

"I do not follow..?"

The Fae Knights of Avalon, Baobhan Sith and Barghest, were gathered in the former girl's room. After everything they had gone through in their native Lostbelt, they could enjoy a peaceful life in Chaldea. But that also meant that they were allowed to develop some rather nasty habits that humanized them even more than they already had been.

"Disrobe, Barghest. I want to see the pride you're keeping hidden. The same pride that you've been showing Mother. I know what you two do behind closed doors, do not try to deceive me." The redheaded Fae said with her arms crossed. All while her smile started to crease into a smirk, the young gremlin barely able to keep her little plot under wraps.

Barghest did as she was told, respecting her fellow Knight and Fae as much as one could imagine. It did not matter to her that she was showing off her naked body, nor the many muscles that she had built up from constantly training herself to protect the ones she held dear. Whether it was her Master or her Queen.

What she revealed in the process, however, was the massive length that was hanging from her crotch. That thick shaft which had a few black and red spots lining it. It was a piece of meat that she was both embarrassed and proud of. Embarrassed because it made her so different from every other Fae, but proud of it because of how much her Queen told her to maintain it. Sure, the faintest traits of her hound-like nature were still visible on it, but that only emphasized just how powerful it was. Especially since it was already the size of one of her thighs, and it wasn't even erect yet.

"What did you want to see it for, Baobhan Sith-"

Barghest's eyes widened as she suddenly felt a pressure building in her exposed rod, which snapped to attention as a soft red glow started to fill it. A soft red glow that was emitted from the very tip of her rod, courtesy of something that now sealed that hole off.

What else could it be but the other Fae's Noble Phantasm, considering the wicked grin on her face as she carefully circled that closed-off hole? "You really are too trusting, Barghest. Far too trusting. But that's alright. This is all for your own good. So you may be able to pleasure our Master, and Mother, should they ever need you to join them in bed. This is all to make sure you can satisfy them properly..."

"I-I do not understand." Barghest muttered, trembling all over as she felt the magic-enhanced pressure in the tip of her cock. "What is the purpose of sealing all of this away..?" She had to ask, because otherwise she wouldn't understand. She'd be wading through the muck of ignorance hoping for this pressure to go away. If only she could understand, then...

Baobhan Sith rolled her eyes a bit as she idly slapped the seal she had made on that oversized shaft. "A little bird here at Chaldea told me about a fun activity that many men participate in. No Nut November. It's supposed to show their resilience towards any outside stimulus, and build them up so they can have one long and satisfying day of intimacy with their partner." She explained, before tapping that seal once more and watching the ripples roll along her fellow Fae's shaft. "This is why I've sealed you off. For the rest of this month, until we reach the days where snow starts to fall, you are to endure the effects of my seal. Should you succeed, I will help set you up with our Master... Or if you truly wish to test yourself and see how far you've come following this 'training', I'll ask Mother to join you in bed. You want a night alone with either of them, don't you, Barghest?"

"I..." Barghest dwelled on it. Even as she could already hear her cock practically screaming to be released. She wasn't one to put a muzzle on herself. Even when she served her Queen in Avalon, she just fought for what she thought was right. But if this kind of restraint would let her end up becoming a better Knight... Or more importantly, lover to two of the most important women in her life, then she would have to just accept it and do her best to carry out this task. "I will do what I can, Baobhan Sith. Thank you for letting me know of this challenge. On my honor as a Knight, I will see it through and satisfy those that I love by the end of it all."

Baobhan Sith continued to roll her eyes to the point where her irises momentarily disappeared from how much they were rolling around, sighing and waving her off. "Just make sure you don't make a mess while you're enduring. And if you want to give up, just come and let me know. I'll humiliate you in public for your lack of dilligence, but I wouldn't blame you for failing to endure. Even the Knights of the Round Table have had trouble with this challenge."

Those last few words set off something inside the Fae Knight's heart, her confidence and her belief in being able to finish this challenge skyrocketing. "Very well! If the Knights have been unable to fight against their own libido, then I will prove myself their better! Inspired by their devotion, I will conquer this challenge and see it through. I will be seeing you in a month, Baobhan Sith! Just you wait!"

And with that, she disappeared off into another part of the enormous complex. All while the red-haired Fae quietly yawned and collapsed onto her bed. Somehow, sealing off that big pup's rod hadn't been nearly as entertaining as she thought it would've been...

Maybe once she was done, it'd be more fun...

---

"Baobhan... Sith..!"

The red-headed Fae slowly yawned as she climbed out of bed. Strange, did she hear anything? She thought that everyone had gone to bed early, since it was Christmas Eve. Mother and Master had promised her that she would get presents from the both of them when Day rose, so she had turned in for the night early.

Just looking at the calendar, and it definitely seemed like everything was as it should be. Still the twenty fourth. Still night. Still way too long before the fateful moment would come to pass. And yet it felt like she was forgetting something. It felt like she had completely misplaced something that she should've tried to keep in mind... What was it?

Baobhan Sith rubbed her chin a bit as she paced back and forth. Ignoring the wild sounds right outside her door, those were probably of some form of Berserker who couldn't sleep. Probably that cow from Japan, she always found a way to get upset over people not being in bed at the right time. What was it that was giving her so much trouble regarding her memory, however..?

"Hmmm... Did I really forget something, or is my mind just trying to play a trick on me?" The redheaded Fae muttered to herself, before she eventually just shrugged. "I must just be imagining things. I should just go back to bed, and then Christmas Day will arrive by the time I open my eyes again." She giggled, sighing sweetly as the thought of being spoiled by two of the women that she held most dear actually treating her like the little girl she was at heart.

"BAOBHAN SITH!"

Unfortunately for the red-haired Fae, she wasn't just imagining things. Especially not as somebody smashed through her door, the sheer weight of her fury causing the air inside the younger girl's bedroom to quickly thicken. No, wait, it wasn't thickening. It was getting... Smellier..?

It took Baobhan Sith a moment to process what had just happened, but as she looked up at the blonde woman towering over her, she completely understood and at the same time realized just how she had messed up. Of course, the seal that she had placed... How could she have forgotten.

Barghest was panting as she hovered over her fellow Fae Knight. Not only had her body mass increased to the point where she was twice her original size, a show of how her power was on the verge of breaking free thanks to the effects of sealing her cock, but that very same rod was now about the combined size of her arm and her leg. And not only was it throbbing like mad, it was also pointed straight at her fellow Fae, the tip trembling as the seal remained in place despite everything. Of course, her nuts weren't in the best condition either, those massive cumtanks having gotten so big that they were the size of beanbag chairs scraping against the floor while they were being weighed down by their sticky contents...

"B-Barghest, there you are! I was meaning to unseal your rod, it just kind of slipped my mind!" Baobhan Sith tried to play all of this off as an honest mistake. It really was, considering she had let it slip her mind for the better part of two months, but that didn't mean that it would be a fitting excuse. Especially not as the hound towered over her like this, filling the room with more of her pent-up cock must that was making it harder and harder to think thanks to how concentrated the smell was.

The oversized Black Hound drooled as she looked down at her fellow Fae. Her cock had not only grown so enormous that it could be used as a form of battering ram should the need arise, but it had also turned a firm shade of reddish black. All of her power was brimming within it. There was no way for her to resist the need to use it, and there was a perfect hole in front of her. Not only was the hole perfect, but it would also serve as a way to deal with the frustrations that had been bubbling up inside of her thanks to the circumstances behind her sealing..!

Baobhan Sith felt the sweat running down her face, only to flinch as a bit of that drool splattered onto her head. "B-Barghest! Stand down, this instant!" It flipped her switch as she tried to use her authority as her Mother's favorite as a way to make her stop. Anything to avoid-

It didn't work. The moment she tried to shout, Barghest grabbed ahold of her much smaller body. And instead of thinking about anything like how she would fit or how she should be gentle, the massive Black Hound did what she did best with her tool. Slamming it straight into the most open hole and start thrusting.

The red-haired Fae's eyes widened wildly as every little bit of her body was distended by the cock shoving into her. Her poor butthole had been completely ravaged in one fell swoop, and the mixture of pain and pleasure was making it hard for her brain to register and understand what had just happened, She could at least register that she was relieved by the fact her pussy was untouched, but the fact that the cock could reach so far into her when it was hilted into her ass made it almost impossible for her to find any other positive.

Especially as it reached so deep into her that she could barely move a muscle. That was how much the cock filled her. It made her utterly unable to move, all while her dress had completely torn off her thanks to the size of the Black Hound's shaft. She was left naked, humiliated, and unable to do anything except try to enjoy the sheer onslaught that was happening to her senses. And that was before the big dog had started to thrust properly...

Since there wasn't exactly much space for Barghest to thrust into, the Black Hound did the only thing that made sense when you had your cock stuck in a small hole. You grabbed ahold of the source of the hole, and you moved it further down your cock. Practically treating her fellow Fae like little more than an onahole, she forced her deeper and deeper, her cock stretching out her stomach more and more in the process.

Baobhan Sith's eyes were rolling into the back of her head as she felt herself being stretched that wildly. It felt absurd. It felt... It felt good, that was the worst part of it. She didn't understand why it felt good. Was it because of all the musk she had been inhaling? Was it because she had some secret masochistic streak? Whichever the case was, it felt really good..!

The second that she felt her ass pushing up against the base of her fellow Fae's cock, she let out a powerful moan and was forced to climax right then and there. What else could've happened, the insides of her ass had been stretched so wildly that she would never be able to close that hole ever again. Not to mention her stomach being so distended that she'd be stuck with a flabby piece of skin that would always sag thanks to what Barghest had done.

But by climaxing thanks to the irrepairable changes happening to her body, she lost control over the one thing that was keeping her safe. The Noble Phantasm that had been used to seal off the Black Hound's cock. The proverbial nail that rested inside the oversized Fae's urethra vanished in a puff of red smoke, and almost immediately after that, the loud sound of cum churning and trying to escape its containment rung out through the small Fae's room...

Barghest let out a powerful cry as she shoved even deeper into the much shorter Fae's hole, stretching her stomach even further as spheres started to visibly travel up her shaft. Not just one or two, but a steady stream of repeated and oversized spheres poured up the side of her shaft, with every single one of them resulting in a powerful blast of sticky seed once it hit the tip.

Baobhan Sith felt the first one explode inside her, and she let out an orgasmic moan as her stomach distended even further as the white breeding batter started to fill her up. It was like her stomach was visibly growing, all while still being horribly stretched by the cock. And it only grew more egregious as she felt the next load filling her, another orgasmic scream leaving ler lips as she felt like she was about to lose her mind from the sheer intensity of it all.

More and more and more of the cum that Barghest had been saving poured out. Even before she had emptied out half of her total cum inside that hole, her fellow Fae had already grown so large that you couldn't visibly see the outline of her cock stretching out her belly any longer. That was how much she had been forced to soak up. That was how much that she had to endure. This was all her own fault too, because if she had just remembered to unseal her at the start of the month, she would've been filling her Mother or her Master instead!

Baobhan Sith's stomach was eventually turning bright red as it just couldn't handle any more, her body trembling as something started to pour up her throat. Since nothing more could be contained inside that tiny belly of hers, it only made sense that some of it would end up pouring out the other end. Because where else was it supposed to go?

The redheaded Fae was barely aware of what was happening to her by the time that the cum started to practically vomit out of her mouth with such intensity that it was covering the walls. And the cum that didn't manage to stick quickly rolled down the walls and gathered in a small pool on the ground, something that wouldn't at all be a problem...

If her partner was anywhere close to being done with her climaxes. But Barghest was not even close to done. She still had one full nut's worth of cum left inside her sack. A full nut that would be blasting all its contents all over the room, given that no more could fit inside the Fae.

Somewhere, quietly inside Baobhan Sith's mind, she hoped that this would come to an end sometime soon. Just so she could stop feeling bloated...

---

Light poured in from outside the redheaded Fae's room, as the daytime lights had turned on. And if anybody bothered to try and check out the source of all the cries and the sticky sounds that had been flowing through the complex throughout the night, they would be greeted with an absurd sight that mirrored the kind of love that their Master would partake in on special occasions.

Barghest let out one final howl as the Black Hound emptied the last bits of her cum into the distended and destroyed hole of the Fae Knight that had sealed her, before she finally succumbed to her stamina leaving her, collapsing against the one she had filled so much.

Baobhan Sith... She was so engorged with seed that she could hardly move, hardly think, and mostly importantly, hardly fit inside her own room. The walls had done an amazing job at staying properly flush despite the pressure put upon them, but there was no way about it. She was stuck filling up every inch of her room, all thanks to how much Barghest had filled her.

...Perhaps she would learn her lesson after this. Or perhaps... A brand new interest would be born inside the young Fae's heart...