Impregnate Your Little Sister
'Have you both lost your minds...?'
Right before my eyes, my half-brother and little sister were intertwining their bodies. And they were doing it on the exact same bed where Arwen and I had just finished having sex.
"Haaang, haaang♡ Yes, just like that. As expected, Oppa’s cock is perfect. My hole still remembers its size♡"
Cordelia had wrapped her legs around Arwen’s waist and was crying out in ecstasy, even spitting saliva everywhere. It was a lewd, melting voice I never would have imagined coming from someone with such a cold personality.
Arwen was also thrusting his hips with vigor, responding to Cordelia’s desperate pleas for his seed. The wet, squelching sounds they made filled my head completely. It wasn’t so much unpleasant as it was dizzying.
If this had been ordinary intercourse between a man and woman simply seeking mutual pleasure, it might have been easier to bear. But what Arwen and Cordelia were doing was the primal act of a male and female trying to leave offspring behind.
I never knew watching such a depraved act would make my heart feel this uneasy. They were the ones committing the sin, so why was I the one feeling anxious? Complaining was something only people with mental leeway could do. Right now, I had neither the mental strength nor the time to complain.
But unlike me, Professor Emilia watched the pair with complete calm, as if she were used to such scenes. Her composure was so absolute that I started wondering if I was the strange one here, not Arwen and Cordelia.
She even twisted her legs together while watching them devour each other so greedily, as if the sight was making her own lower regions tingle. Eventually, Emilia slipped her slender index finger inside her clothes. From her pussy came wet, squelching sounds—lewd noises that made it obvious what she was doing even without looking.
Who in this world could possibly imagine a sight like this? A brother and sister sharing their bodies while the brother’s lover watched and masturbated?
"Goddess Elysia, please tell me this is a dream..."
I even prayed to a goddess I had never called upon before, but of course, the goddess did not answer the prayers of an unbeliever.
Sophia, who had been watching us have sex from the side, had grown unusually quiet. She seemed to be muttering something, but her voice was so small I couldn’t make it out. Or perhaps I simply wasn’t paying any attention to her at all. No, that was definitely it.
The pussy of a female who had resolved to get pregnant was squeezing my cock far tighter than I had imagined. Even though it was the same woman and the same position as before, this was an entirely new kind of pleasure.
"Ugh, you’re squeezing me way tighter than usual?"
"I don’t know either♡ Oppa’s cock… hic♡ Oppa’s cock feels so much bigger and harder♡"
Cordelia panted heavily, her mouth slightly open as if she were a fatally alluring red fruit. I gathered a mouthful of saliva on my tongue and let it drip onto hers. Immediately, Cordelia grabbed my neck, pulled me down, and devoured my mouth with greedy moans.
"Mmmph, haat♡"
Our two tongues tangled together as if they had originally been one. We drank each other’s saliva like people stranded in a desert, driven mad by thirst. The blatant gulping sounds could have been coming from my throat or Cordelia’s—I couldn’t tell.
When our lips finally parted, Cordelia looked disappointed, but she had no choice. Her breath had risen all the way to her chin. My mouth and nose were completely filled with Cordelia’s scent. It wasn’t unpleasant—it was lethal. The only thought in my head was that I had to ravish Cordelia right this instant.
It felt like the two of us had been left alone in this wide world, inside this tiny room.
Cordelia’s voluptuous breasts swayed in time with my hip movements. Even though no one was touching them, the soft flesh jiggled like the surface of water after a droplet fell. Without thinking, I grabbed those breasts that tempted me with their softness. The flesh sank deeply between all ten of my fingers.
It felt like biting into firm, bouncy pudding. Every time I squeezed and released, Cordelia’s breasts repeated the cycle of contraction and expansion. The incredible hydraulic pressure made it feel less like I was massaging her breasts and more like her breasts were massaging my hands.
No matter how many times I touched them, I could only sigh in admiration at their elasticity. Cordelia looked at me with affectionate eyes as I kneaded her breasts and spoke. No—she demanded.
"Hauk, touching feels good, but I want Oppa to suck on them with your mouth♡"
As she spoke, she dipped her fingers in the love juices flowing down her thighs and began slowly rubbing her own erect nipples. Thanks to that, her hardened nipples glistened with Cordelia’s nectar.
I didn’t hesitate to bring my mouth to them, like a bee drawn to the pistil of a flower. As soon as I took the flower into my mouth, I could feel Cordelia’s hardened nub on my tongue. I gently circled the tip of her nipple with my tongue before pressing my lips firmly against her breast. Then I sucked in air and drew her nipple deep into my mouth.
Chuuup, chuuup. The vulgar sucking sounds echoed from my mouth. When I thought about how this breast would one day fill with milk for my child, I couldn’t suppress my excitement at all. With the determination to suck out even the milk that wasn’t there yet, I savored my little sister’s breasts.
My face was buried deep in her massive cleavage, so she couldn’t see my expression, but Cordelia seemed satisfied with my caresses. Every time the tip of my tongue flicked the end of her nipple, her pussy hole tightened around me. I could tell just from her voice.
"I love iiiiit♡ Oppa is sucking on my tits. It really feels like I’ve become a baby’s mommy♡"
Cordelia let out a hoarse moan and ran her hands through her older brother’s hair as he clung to her chest. It was clumsy, but I could feel the motherly touch of a woman stroking a baby for whom her milk was the only food in the world.
When I tried to pull my mouth away for a moment to catch my breath, Cordelia grabbed my head and refused to let go. The unexpectedly strong grip almost startled me. Was this the power of a mother rather than just a woman? Of course she wasn’t one yet, but that was the feeling.
Cordelia cried out.
"No, suck harder♡ Practice breastfeeding on your little sister who’s about to become a mommy, haaang♡"
The sharp moans coming from Cordelia told me that, based on all my experience so far, her reason had already flown far beyond the realm of pleasure. Since she wouldn’t be able to hear me no matter what I said now, I obediently helped my little sister with the breastfeeding practice she had requested.
Only when her nipple was about to fall off from being soaked in saliva did Cordelia finally release me. The face I saw now was no joke. Her trembling pupils were completely intoxicated by a drug called pleasure.
With her tongue hanging limply from her mouth like an exhausted person, Cordelia mumbled.
"Haa, haa♡ I’ve never felt anything like this before. It feels like something I had forgotten since birth is finally being fulfilled… I want to become a real mother as soon as possible♡"
With a faint voice, Cordelia was testifying to the pleasure that sex for the sake of pregnancy brought.
"You don’t have to rush me. Ugh… It’ll happen exactly as you want very soon, Cordelia."
I gently rubbed her belly in a clockwise motion and carefully adjusted my position. The lower abdomen where her womb lay twitched. I was going to swell that slim belly with my seed.
In truth, right after I used the Guaranteed Pregnancy Semen skill and thrust inside Cordelia, my cock had immediately reached its limit. The urge to ejaculate boiled up from the deepest part of my body, and my lower abdomen felt like it would explode at any moment. My convulsing cock screamed at me to stop holding back and impregnate the female beneath me right now.
I had been suppressing the desire to savor Cordelia’s body, but even that was now impossible. I felt like I would cum from a single wrong cough.
I confessed honestly to Cordelia.
"Sorry, Cordelia. I’m at my limit. If I hold back any longer, I think I’ll really lose my mind."
Cordelia’s face flushed bright red as she gave a small smile. She spread her arms as if inviting me into her embrace and said,
"Aang♡ It’s okay. I’ll take every last drop of Oppa’s baby seed. Hic, don’t worry and just cum inside my womb♡"
When I leaned down, Cordelia wrapped her slender arms around my neck with effort and simultaneously coiled her sweat-slicked thighs around my waist. Her soft thighs and plump buttocks clung tightly to my skin. As our slightly different body temperatures sought equilibrium, Cordelia and I became one complete whole.
At this moment, not even Sophia’s chatter could disturb us. Sorry to say it, but not even Emilia could.
While embraced in my little sister’s arms, I gradually increased the speed of my thrusts. My glans scraped roughly against her inner walls. It didn’t matter if my waist gave out. Cordelia wasn’t staying still either—she bucked her hips in time with my movements.
When my lower abdomen rubbed against her pubic hair, the rustling sound of hair tangling together rang out. At the same time, the violent squelching sounds produced by her pussy connected to my cock—like a broken car driving at full speed—pushed my movements to their peak.
"I’m cumming! I’m going to cum inside my lewd little sister who’s squeezing her big brother’s baby!"
"Haaaaaaaaang♡ Creampie me and make me cum♡ I’m becoming both a mother and an aunt at the same time♡"
Taking Cordelia’s moan as the signal, I released all the strength I had been holding in my cock at once. The dam that had been blocked burst open—a dam filled with semen. The cock that had been tied down by an invisible rope throbbed as it spat out the semen it had endured for so long.
The pain that felt like it would tear my urethra apart was drowned out by overwhelming pleasure and disappeared. Cordelia’s arms and legs, which had been binding me, slowly loosened as if she no longer had the strength to cling to me. Then she lay there limply, still convulsing.
When I pulled my cock out, a pop sound like a cork being removed from a wine bottle came from her pussy, and instead of fragrant wine, a white liquid smelling of night-blooming flowers flowed out.
Cordelia weakly brushed her sweat-soaked hair back and said,
"Haaaa… haaaaaa♡ My womb, my vaginal walls… they’re completely filled with Arwen Oppa’s semen. I can feel Oppa’s energy♡"
I can feel Oppa’s energy. It was a line that seemed to hint at the presence of a new life taking root. The fact that she looked more exhausted than usual might also be because I had used the Guaranteed Pregnancy Semen skill. After all, it was a skill that transcended human physiology.
"How do you feel, Cordelia? Do you sense any changes? Any discomfort inside?"
Cordelia answered while panting heavily, unable to even lift her head.
"Haa, haa… I, I don’t know. It felt much stronger than before… Why? Is something bothering you?"
"No, it’s nothing. You did well, Cordelia."
‘For now, I guess I’ll wait and see?’
While I was carefully watching Cordelia as she lay on the bed panting, a notification window appeared before my eyes.
Stats have increased. Potency: 59 ▶ 60
New skill acquired.
‘Finally reached 60, huh.’
Subjectively, it felt several times more difficult and longer than when I went from 20 to 40 points. After reaching 59 during the presentation, even if I came inside Emilia and Cordelia all day long, it was rare to see even a single point increase.
Perhaps having impregnation sex with my little sister was what satisfied the system. If so, it had quite the hardcore taste. The developer was probably the type who took over an hour just to pick out porn.
Anyway, having finally reached the height I wanted, my heart felt joyful. When I summoned the status window, I saw that a new reward had been registered under the I Possessed the Adult Game Protagonist trait.
'Another skill that defies common sense has appeared.'
I wanted to ask the developer if they couldn’t give me a normal skill that I could proudly tell other people about, but what could I do? It was my own fault for possessing the body of a character in an adult game.