The Womb's Unyielding Seal
The unyielding cock crushed her womb without mercy, swinging its rigid, heavy mass from side to side as it forcibly pried open her inner walls. It hurt, yes, but Sia knew Lua wasn’t truly trying to break her older brother. She understood all too well that until now, Lua had always carefully adjusted her strength to keep her from being destroyed. Yet as if to mock the tenderness blooming in Sia’s heart, Lua was mating with the clear intent of ruining her cunt completely.
“Nnghoook……♡ Ohh……♡”
Foam began rising from the drool spilling from Sia’s lips. Her eyes lost focus, pupils rolling back further with every passing second. She thought it might be better to simply faint like this. Her brain, thoroughly pickled in unending climax, felt like it was on the verge of breaking.
“Haa……♥ This is getting a little tiring. Shall we rest for a moment?”
“Ugh……?♡”
Thankfully, Lua stopped moving, which kept Sia from passing out. No—thankfully was the wrong word. Her golden eyes, now adorned with floating hearts, trembled violently.
“Y-you…… You’re doing this on purpose……!”
There was no chance Lua, whose stamina seemed endless, would grow tired from something like this. Wearing an ecstatic smile, Lua offered no reply to Sia’s accusation. Her silence was affirmation enough: she would not permit her to escape the pleasure by fainting at will.
“You seem to have recovered some strength. Shall we begin again?”
“N-nooo♡”
Squelch. Squish. Sluuurp. Stretch……!
“Nooooooo!♡”
The expansion project on her meat-storage chamber resumed in full force. Her baby-making room was mercilessly crushed and reshaped by the thick cock as Sia came again and again, squirting in rapid succession.
“I have to stretch you this wide so childbirth will be easier later, don’t you think?♥”
“I-I’m not getting pregnant……! Haah♡”
“Not getting pregnant? ……Why must you be so stubborn?”
Thud!
“Nnghoook……!♡”
Lua stopped swinging her hips side to side and began hammering her cock straight into the deepest part of her. Sia’s womb crumpled inward as the impact radiated through her belly. This was the textbook piston motion for breeding. Even Lua could no longer suppress the urge to cum, so she decided to pour everything into one final sprint.
Thud!Thudthudthud!Thudthudthudthudthud!
“Haah♥ Haah♥ So fucking good♥ Shit♥ You like it too, right? Of course you do, you bitch!♥”
“Ugh, nghhh……!♡”
The speed and force were beyond anything an ordinary man could produce, no matter how strong his hips. As her cervix was battered like a piece of meat beneath a mallet, Sia felt consciousness slipping away. Each time she neared the edge, Lua showed a sliver of mercy and allowed her brother a moment’s rest. In the end, though foam bubbled at her mouth, Sia could not faint. She was forced to accept every ounce of that absurd pleasure with perfect clarity.
Thud!Thud!Thuuud!Thudthudthudthud!
“Lu-a—hack♡ Sp-spare me♡ I’m dying♡ Ah, kuhack……!♡”
“Stop whining, you fucking slut! Hngh♥ You don’t want to mate, you don’t want to get pregnant! Since when does not wanting something mean you don’t have to do it? Aang♥”
“I’m sorry, but still—no, hngh♡”
The urge to ejaculate surged forward. Lua drove her cock to the very root one last time and waited for the white-hot sensation that would bleach her mind clean.
“It’s coming! All of it—a full creampie—every drop straight into sister’s womb, ah……♥”
Spurtspurtspurtspurtspurt!
“Oohhh……♡”
Another minute-long ejaculation had begun. Thick ropes of semen surged into her in violent waves. Every time her belly swelled a little more, Sia threw her head back and climaxed without pause. Since even Lua could not control the ejaculation itself, there was no way to stop and let her rest.
Spurrrtle. Spurt!
“It’s still coming, ngh, ugh♥ I will absolutely get you pregnant!♥ Hngh♥”
“Nnghoook……♡”
Unable to endure the overwhelming flood, Sia finally passed out—tongue lolling, eyes rolled back. Her limbs went completely limp, yet her pelvis continued to twitch and shiver with every fresh spurt of cum. Lua, too, wore a drooling, idiotic expression as she surrendered herself to the pleasure that felt like her very soul was being sucked inside.
Had it not been for the Subjugation Curse, those vigorous sperm—more than enough to guarantee pregnancy—filled Sia’s womb to bursting.
“Haah♥ Haaah♥ Fuck……♥ I’m not finished yet and you just—fainted on your own, you lazy bitch……! Wake up!”
Thud!
Even after finishing, Lua did not pull out. She immediately slammed back inside. Sia could only twitch like a broken doll beneath her strength, offering no response whatsoever.
Thud!Thudthud!Thuuud!
“Wake up! I said wake up! Ngh♥ Wake up and apologize! Apologize to all the sperm that are going to die without fertilizing anything because of you! Haang♥”
With every thrust, the massive load packed inside her was forced upward by the pressure. Sticky white fluid squeezed out through the tight seal between pussy and cock, lewdly soaking Sia’s thighs.
“Ahng♥ It’s—coming out……!♥”
Spurtspurtspurtspurt!
“Kuhuuu……♥”
Spurtspurtspurt!
Lua pressed down until Sia’s pelvis sank into the mattress, unleashing several more monstrous ejaculations. Only after three or four more loads did she finally feel satisfied. Enjoying the lingering afterglow, she admired the sight of her older brother.
A completely broken machine. The pathetic, ruined state of a beautiful woman ravaged by cock. The overwhelming sense of conquest it brought Lua was utterly intoxicating.
“Haa……♥”
Lua moved to pull her cock free, then froze.
“……What a waste.”
Sia’s lower belly was visibly swollen with semen. The moment she withdrew, all of it would gush out. These were sperm of higher quality than anything any male in the world could produce. Simply throwing them away felt far too regrettable.
As that thought crossed her mind, a plan formed.
“Ah…… ugh……”
At that moment, Sia’s consciousness returned. Though she still looked dazed, Lua was delighted she could share her new idea.
“Haa……♥ I just thought of something wonderful, sister♥”
“P-plan……?”
“First, let’s take this out—hngh……!♥”
Sluuurp. Schluuuurp……!
“Nnghoooooh♡”
Lua’s cock scraped every inch of her walls as it withdrew. Sia’s pussy seemed reluctant to let it go, clinging tightly to the thick shaft. The stimulation against their oversensitive post-climax flesh made both of them grimace.
“Ungiiik?!♡”
Sia came again, squirting violently. As Lua’s cock pushed out the last remnants from her urethra and finally emerged, Sia’s pussy refused to close. Her labia gaped like a fish’s mouth, endlessly pouring out the excess semen that had overflowed her womb. Her swollen belly slowly deflated back to its normal shape.
While Sia’s entire body continued to shiver on the edge of another faint, Lua quickly retrieved something from the drawer and shoved it straight into her cunt.
“Nnghooooooh?!♡”
It was the very dildo she had used to sexually torture her before. Thanks to having just taken something far larger and superior, it slid in to the hilt without resistance. Acting as a perfect plug, it stopped any further leakage.
“Perfect. This should keep everything inside until fertilization is complete, yes?”
“Ungh……♡ B-but I can’t get pregnant……♡”
“It’s an order. Until I give you permission, you are not allowed to remove it under any circumstances.”
“Wh-what? Hngh……?!♡”
The womb tattoo flared with heat—the unmistakable sign that the Subjugation Curse had accepted its master’s command.
Sia was now physically incapable of removing the dildo herself. Constant waves of pleasure radiated from inside her vagina, keeping her heated body from cooling even slightly.
“Ah, my belly…… it’s so hot…… I’m going crazy……♡”
“It hurts, doesn’t it? Then erase the womb tattoo. If you do, you won’t have to obey the order and you’ll be able to pull the dildo out.”
“Nooo……♡ If I do that…….”
Her womb was packed full of living sperm. The instant the tattoo disappeared, she would become pregnant with her little sister’s child. She had to keep the mark active at least until every last sperm had died.
“Are you sure you’ll be all right? This is your only chance. Starting tomorrow, both I and the royal physician will be leaving for the capital.”
In other words, once tonight ended, neither Lua nor Dimaria would be able to cancel the order or lift the curse. Until they returned, even if Sia broke and begged to change her mind, she would be unable to remove the dildo.
“If, if someone finds out about this, what will you do……♡”
“Find out? No. Brother will hide it perfectly. The moment it’s revealed, my honor would be destroyed. You don’t want that, do you?”
“Ugh……♡ You’re so cruel……♡”
It was true. Sia had always placed her younger sister—who would one day bear the family’s burdens—far above her own worthless self. No matter how painful it became, she would desperately conceal the fact that a dildo was lodged inside her. Even if discovered, she would claim she had inserted it herself. Otherwise the world would learn that the Grand Duke was using her older brother as a sex slave. Lua was ruthlessly exploiting even that part of Sia’s personality to break both her body and mind.
Lua’s own conscience ached, but her brother’s stubbornness left her no choice. Really, she should just get pregnant already.
“I’m quite curious what state you’ll be in when we return♥”
“Th-this is nothing……! I-I can endure it……♡”
“Of course. That little dildo is nothing compared to my magnificent cock. But that’s exactly why it will be even more effective.”
“U-ugh……?♡”
“You’ll understand soon enough. Eventually, brother will be the one clinging to me first—begging to erase the womb tattoo and swearing you’ll do anything, even get pregnant.”
“That will never happen……♡”
To Sia’s feeble resistance, Lua responded with a scornful laugh.
“Do as you like. Ah, and brother—one more thing I want to make perfectly clear. I am not simply using you as a breeding vessel.”
“Hngh……?♡”
Lua placed a hand over her own heart as if making a solemn vow.
“When you become pregnant, I will hide nothing. I will announce it to the entire world. That I possess male reproductive organs, and that I intend to take you as my wife.”
“Wh-what……?!”
Sia had assumed that even if she carried Lua’s child, her sister would still conceal the truth of who had impregnated her. After all, the curse had been hidden until now, and she expected it to remain that way.
“I have no intention of finding you another husband, nor of avoiding responsibility for the person I’ve impregnated.”
Lua no longer wanted to hide. She felt certain she would regret it when death came for her again. If she succeeded in getting her brother pregnant, she would reveal everything. Once a child was already on the way, the retainers would find it far harder to stand in their way.
“You—no, sister—will become Sia Tanalif, Grand Duchess. And I will ensure you receive every honor and privilege that title deserves. No one will ever dare look down on you again. We will both be happy. I promise.”
“Ah…… aah……”
Sia let out a despairing sigh at the ruthless plan, but Lua paid it no mind. She leaned down and pressed a kiss filled with hope to her older brother’s forehead, damp with the sweat of despair.