The Secret
The faint rustle of sheets filled the room in the dead of night, long past midnight. Isis tossed and turned, unable to fall asleep.
“Haa… why does my body feel like this?”
Deep down, she already knew. She understood exactly what her body’s condition meant. But admitting it would mean she could never look her little brother in the eye again.
When she closed her eyes once more, the events of the day replayed vividly in her mind. The large hand that had pulled her close. The solid, warm embrace. The firm chest. And above all else, Luan’s massive cock.
The last time they had bathed together was when Luan was seven. That meant it had been a full thirteen years since she last saw it. Back then, it had been an adorable little thing that barely covered two finger joints. Now it had grown as thick as a forearm.
But that wasn’t what mattered.
The real problem was the emotions she had felt while stroking his cock afterward. The slight salty taste. The thick, masculine scent that had assaulted her senses. That wild, almost pungent smell still lingered in her mouth.
Whenever she opened her lips, the memory of having it in her mouth surged back, and her body heated up on its own.
“Luan…”
Isis whispered her brother’s name and placed a hand over her breast. Her full, swollen bosom still carried a burning sensation, as if it had been branded by his touch. She couldn’t forget the way his hands had felt on her, and she craved it.
The moment she acknowledged that craving, the heat spreading through her body intensified. The nipple pressed beneath her palm stiffened, rising proudly.
After a moment of hesitation, Isis moved her hand.
Slide—
The friction between her palm and the hard nipple sent a faint wave of pleasure through her. A shiver ran down her spine. Her lower belly tightened, and the space between her thighs grew slick.
The impulse took root in her mind.
More. I want more!
She knew that going any further would be irreversible, yet she ultimately surrendered to temptation.
Her hand curled, squeezing her breast. Memories from the past overlapped with the sensation, making it feel exactly as if Luan were caressing her. Isis moved her hand again and again, as if possessed. She chased the feeling, desperate to feel even a little more, to cool the burning heat inside her.
“Mmm… hng! Haaauu…”
She didn’t even try to hold back her moans. Like the saying about a thief who learns late never knowing when dawn breaks, she had never once masturbated in her life. She fell completely into this strange yet captivating pleasure.
The guilt she felt toward Luan and the self-loathing she felt toward herself merged into one single emotion—taboo ecstasy.
While endlessly kneading her breasts, Isis suddenly realized the wetness between her legs had gone far beyond mere slickness. Instinctively rubbing her thighs together, she turned her head to look out the window—toward the direction of Luan’s room.
“Luan… I’m sorry. I’m sorry for being such a pathetic older sister.”
Isis apologized to her brother. Because she knew she couldn’t stop here. Because her limited experience meant she couldn’t even imagine another man, so she had no choice but to commit the sin of incest, even if only in her fantasies.
That was why she felt sorry toward Luan—and at the same time, unbearably aroused.
As if trying to look away, Isis stared at the ceiling and shoved her other hand inside her pajama bottoms. It slid over her smooth lower belly, past her neatly trimmed pubic hair, until it finally reached the soaked slit.
Her tightly closed pussy twitched intermittently, steadily leaking her juices.
After swirling around the area for a moment and coating her fingers in the slick fluid, she carefully began rubbing her slit.
Squelch!
“Ugh…”
The wet sound spread pleasure that stimulated her peripheral nerves. More nectar flowed from the slightly parted gap under the pressure of her fingers. It was incredibly hot and sticky. Just like when Luan had touched her breasts.
“Luan… Luan…”
Isis repeated her precious little brother’s name as she began to masturbate in earnest. She used her middle finger to stroke between her folds, her index and ring fingers pressing down on her plump labia, while her other hand roughly kneaded her breast. Occasionally twisting her stiff nipple made her pussy flood like a dam had burst.
Her panties lost their function in seconds. Her pajama bottoms were completely soaked, forming a round wet stain on the bed centered around her pussy.
But Isis paid no attention to any of that. She was completely absorbed in pleasuring herself.
Squish! Squish!
“Ahng! Haaang… Luan. It feels so good…”
In her imagination, she was being held in Luan’s broad chest and caressed by him. Normally she would never dare think such things, but consumed by lust, she easily leaped over the hurdle of being siblings and longed for even more.
The only thing stopping her from going further was her lingering aversion to actual penetration. Even as she tried to push her fingers inside, the last shred of reason slammed on the brakes and refused to allow it.
In the end, she gave up on penetration and moved her hand slightly upward instead. There, her clitoris had already swollen with excitement.
Schlick!
“Aauung…!”
The moment she rubbed it, her inner walls clenched hard, squeezing out drops of nectar. The fireball burning deep in her womb felt like it had grown even larger.
Isis ran her fingers from her clitoris all the way to near her anus, desperately chasing more pleasure. The speed gradually increased. It was proof that climax was approaching.
Her mind turned pure white with ecstasy. Her waist naturally lifted into the air. Feeling her body arching more and more, Isis continued to fondle her breasts and pussy until, right before the fireball in her womb exploded, she pinched and twisted both her clitoris and nipple at the same time.
For a moment, a flash of light burst before her eyes.
“Aaaaaauuuugh…!”
Isis reached orgasm with a lewd cry, thrusting her hips high as she squirted from her pussy.
Splash!
Spluuuurt!
Fwuuuush!
Her nectar drew arcs through the air, flying past the bed and soaking the floor. Her hips bucked wildly up and down as she scattered her juices at the peak of her orgasm.
After squirting a total of five times, Isis finally dropped her waist back onto the mattress with a refreshed sense of satisfaction.
“Ahhak! Aauu… huuung…!”
Even though her excitement hadn’t fully subsided and she was only breathing, faint aftershocks still tingled through her body. If she wanted, she could probably keep going as much as she liked, but Isis’s lust wasn’t strong enough to continue.
Instead, once her desire was satisfied, her reason slowly returned and she became aware of what she had just done.
“What the hell have I done…?”
She fell into a pit of self-reproach and muttered, lifting one hand in front of her eyes. It glistened, drenched in her own fluids. Every lewd thought and word she had uttered while touching herself flooded back, bringing a surge of shame and self-disgust.
How could she do something so obscene while thinking of her own little brother? It was utterly repulsive.
“Luan…”
But what was even worse was that, even while condemning herself, she couldn’t forget the sensations she had just experienced. Now that she knew, there was no going back to ignorance.
From now on, every time lust tormented her and she eventually gave in to masturbation, she would have to feel these same emotions.
“Luan, I’m sorry. I… I don’t think I can hold back anymore.”
Her first caress. Her first masturbation. Her first orgasm. She had experienced all of them with her little brother.
How many more things would they end up sharing in the future?
She felt both fear and anticipation.
Lying still as she sorted through her complicated emotions, Isis finally calmed down enough to get up and head to the shower room.
Shaaaaaaa—!
When she turned on the shower, cold water poured down. The icy chill completely washed away the lingering heat and cleared her mind considerably.
She looked at the mirror in front of her. Black hair and silver eyes. The traits of the Priuli family. Both lovable and resentful.
“Father. I’m sorry. I can’t do it.”
Isis’s eyes traced back through time, recalling the memory from a few days ago.
After the meal ended and Luan left, only Isis and Ian remained in the dining room.
Ian took a sip of wine and asked,
“Isis. How is the surveillance on Luan proceeding?”
“…As I wrote in the letter, he has noticed. If we continue, he will become extremely angry.”
Luan’s surveillance. It was a role Isis had been performing for eight years, ever since Ian personally assigned it to her.
When she first received the order, she had wanted to turn away from the truth. That was why she had avoided Luan for a while out of guilt. Perhaps that was when it started—when Luan’s personality suddenly became dependent, eventually twisting into that of a complete scoundrel.
She still regretted her actions from back then.
Ian pushed his will onto Isis as she tried to express her discomfort indirectly.
“But you know it as well. That we cannot stop.”
“…Since entering the Academy, Luan has improved a lot. He attends classes diligently and has made wholesome friends.”
Isis tried desperately to persuade him. She emphasized that Luan had changed and that things would not turn out as feared, but Ian’s expression didn’t even twitch.
“Isis. I am sorry for burdening you with this. In my heart, I would like to continue doing it myself. However, I cannot leave my post. You understood that, didn’t you?”
“Even so… I don’t want to do something like this.”
If Luan had maintained his original attitude and continued to hurt her, Isis might have accepted Ian’s command. But Luan’s behavior over the past few months had made her hesitate.
Ian had also noticed the change during their brief meeting and understood her feelings. However, he could not yield on this matter.
He pressed her firmly.
“Isis. Come to your senses! Do you truly wish for Luan to become the enemy of the Empire—no, of all humanity?”
“Of course not! That would never happen!”
“Then continue the surveillance. Understood?”
Isis bit her lip hard.
Eight years ago, the moment she heard those words from Ian, she had wanted to scream. She wanted to ask if that information was really true, if it was right to torment Luan because of such a ridiculous prophecy, and whether he was truly… their father.
Rage and resentment welled up in her chest, but Isis could not let them out. Because she believed that her father was suffering just as much as she was.
If he had truly wanted to cut off every possibility, he would not have made the decision to send Luan to the Academy.
“Father… are you really okay with this? There are no eternal secrets. One day Luan will learn the truth and resent you. He might even hate you! Are you truly fine with that?”
Facing Isis’s desperate eyes, Ian widened his own in surprise before giving a bitter smile.
“It doesn’t matter. If that is what it takes for Luan, for you, and for everyone in this territory to live… I will gladly bear it all.”
“Father…”
“If it is too difficult, tell me. I will assign another watcher.”
If she simply said yes here, she could escape the pain. Isis knew that, yet she could not accept the offer. What if the new watcher killed Luan due to some misunderstanding? Could she truly avoid regretting that choice?
She was certain she could not.
Therefore, even if she hated this role, she had to be the one to carry it out.
“No. I will do it. If the end must come for Luan… it should be by my hand.”
“…I see. I will trust you.”
With those final words, Isis left the dining room.