A Breast Milk Party Overflowing with Familial Love

A slightly sweet, thick liquid brushes across my tongue and slides down toward my stomach. To think I could indirectly experience a mother’s love for her child through my younger sister’s breast milk—what a profoundly familial moment. Just the immoral thrill of it surging up my throat was enough to make the cock hanging between my legs swell. I pressed my lonely, throbbing shaft against Sophia’s plump, luscious thighs.

The texture of Sophia’s thighs was exactly as I had imagined it from the very first time I saw her after enrolling at the academy. Firm yet yielding in all the right places, the soft flesh swallowed my glans completely. It felt like I was actually fucking her thighs. When the delicate V-shaped tendon connecting my glans to the root rubbed against her elastic skin, a sharp jolt of pleasure slammed into my cock. It was the perfect accompaniment to the breast milk I was gulping down.

Cordelia, refusing to lose to her brother, sucked her older sister’s breasts with equal fervor. A quick glance showed her throat working visibly, gulping loudly with every swallow.

“...Is this the familial love you and Arwen kept talking about?”

Even without turning to look, I could picture Emilia’s stunned expression from the tone of her voice behind us. How many people in their lifetime ever witnessed a brother and sister simultaneously savoring another sister’s breast milk? And what were the odds that the brother in question was her own lover?

Sorry, but I had no attention to spare for Emilia right now. I was too busy trying to pour every drop of the sweet nectar before me into my stomach.

“Haaung♡ Please, stop sucking! Do you two think you’re babies or something? Ngh♡”

Sophia tried to shake us off, but her arms trembled like someone plunged into an icy winter stream, making it impossible. And as the minutes we clung to her passed, the note of despair in her voice gradually faded, replaced by rising moans.

“Haaaang♡ My breasts feel like they’re going crazy! It’s completely different from when you sucked them earlier♡”

I paused for a moment, pulling my mouth from her nipple. When I lifted my head, Sophia’s milk dripped from my lips. I asked her,

“How about it? Do you finally understand the joy of feeling true familial love?”

Sophia nodded desperately.

“Huuu♡ I feel it… I feel it, so please, just stop now♡”

“The fact that you’re still saying ‘stop’ tells me you haven’t quite gotten it yet.”

“No, that’s not—hic♡”

“Then explain it more clearly. Tell me exactly which part and how it feels.”

Under my relentless questioning, Sophia couldn’t answer right away. She bit down hard on lips that threatened to spill injured-puppy whimpers, then spoke again.

“My… my nipples feel good…”

“Not enough. Be more specific.”

“Huu♡ You’re so mean…”

With a tearful expression, Sophia opened her mouth once more.

“Having my nipples sucked by my little sister and big brother… feels good.”

“Good. Keep going, just like that.”

“Aaaung♡ I got so excited watching the milk spurt out of my nipples♡ Hauk… I came just from having my breast milk sucked by Cordelia and Arwen oppa♡”

At last, Sophia confessed her honest feelings and climaxed. I knew all too well—from Masha—just how powerful the pleasure was that could shatter the mental barriers holding one’s reason in check. The moment she came, Sophia squeezed her own breasts, and milk jetted from the tiny openings in her nipples. A pleasantly warm, wet sensation bathed every inch of my face. It was a good thing I’d closed my eyes in time; otherwise it would have gone straight into them.

My face was now covered in the breast milk Sophia had sprayed, yet I felt no disgust whatsoever. On the contrary, watching her knead her own breasts and milk herself like a perfect female made my lower belly tighten with need. The cock buried between her thighs stiffened violently, as if ready to pierce straight through the thick flesh.

“Kuh… cough, cough. Haa… I nearly died.”

While I licked the precious breast milk dripping down my face, Cordelia also coughed and pulled away from Sophia’s chest. It seemed the sudden explosion of milk during her climax had blocked her airway. Cordelia wiped the messily flowing milk from her mouth with the back of her hand, then licked her palm clean before patting her own belly with that same hand.

“I can’t drink any more… My stomach is completely full of Sophia unnie’s breast milk.”

“How was it, Cordelia? Your impressions after drinking it?”

Cordelia answered with a thoroughly satisfied expression.

“It was the best. I almost came just from drinking unnie’s milk, you know? I want to start producing milk soon too, so I can let a child suck on me. Hehe. Of course, if oppa wants to drink it, I’ll let you anytime.”

Cordelia grabbed her own breasts and popped a nipple into her mouth. It looked like she was trying to burn the memory of sucking her sister’s nipple into her mind. How delightfully lewd.

If I wanted, I could give Cordelia the gift of lactation right this moment, but right now it was Sophia’s turn.

At that moment, Emilia, who had been quietly observing, spoke to Cordelia.

“Was it really that good?”

“Hehe. With Emilia unnie’s beautiful breasts, I’m sure you’d make milk just as delicious ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠as Sophia unnie’s.”

“You think so?”

Cordelia, seemingly awakened to a brand-new fetish, began passionately preaching the virtues of breast milk to Emilia. Leaving the two women engrossed in their heated discussion, I turned back to Sophia.

“Well done. Doesn’t it feel good to honestly confess what’s inside your heart?”

Though her face said she didn’t want to admit it, Sophia admirably acknowledged her true feelings.

“…It felt like my whole body was melting. Like I’d become someone else.”

“You didn’t become someone else. You simply found another side of yourself, Sophia.”

Sophia let out a short snort, her cheeks faintly flushed.

“Don’t act so smug. You were just going to say something like ‘Let’s make a baby right now’ or ‘Become my personal milk slut for life,’ weren’t you?”

She had stolen my next line. My younger sister truly had an excellent sense for reading her brother’s heart without missing a single syllable.

Of course, that didn’t mean I would back down. On the contrary, this was convenient. If she already knew, we could move faster.

I gently tested her feelings.

“You didn’t even retch while saying it, so it can’t be that disgusting to you.”

“Well…”

This time Sophia didn’t deny it immediately. Proof that her heart was beginning to waver. No matter how much her mouth had said no, even Sophia couldn’t hate pleasure that satisfied instincts she hadn’t even been aware of.

She spoke.

“Promise me, Arwen. That you’ll never abandon me or the Reinhardts.”

Her expression told me she had reached a decision. I nodded with all the sincerity I could muster.

“There’s no way I’d abandon precious family. I promise.”

It wasn’t a lie meant to bind her. In a situation where I didn’t even know if I could return to my original world, the only people I could call family were those connected to the Reinhardts—aside from Emilia.

Sophia stared intently into my face for a moment, as if trying to discern her brother’s true intentions. Then she let out a short breath—whether a sigh or a lament, I couldn’t tell—and said,

“Fine. I’ll dance to your tune.”

“Does that mean…?”

Her expression answered for her: You already know what it means.

It was at the point where roughly one hour remained on the quest that Sophia finally agreed to take her older brother’s child into her womb.

Someone might ask why I went through such a difficult path when I could have simply used the Pregnancy Guaranteed Semen skill on Sophia in secret. The answer is simple: it’s my preference. I have no interest in dealing with troublesome complications later from an unwanted pregnancy. And now that Sophia had given her permission, there was no longer any reason to hold back.

I moved on top of her and said,

“You won’t regret today’s choice for the rest of your life. I’ll make sure you’re happy until your very last day.”

“Hah, save those cringey lines for the woman you’ll actually marry someday…”

Her mouth complained, but Sophia’s cheeks flushed at a confession that was essentially a proposal from her older brother. Both Cordelia and Sophia grew cuter the more I got to know them.

My cock twitched hard at Sophia’s adorable reaction. Seeing it rise steadily, she swallowed once. Her seductive, slender throat bobbed visibly.

I gripped my shaft tightly and spoke while pressing it against the hidden entrance between her spread legs.

“I’m putting it in, Sophia. I’m going to cum inside again. And with this thrust, I will definitely impregnate you.”

Even after my firm declaration that I would surely get her pregnant, Sophia didn’t close her legs. Instead, she lifted her hips slightly, adjusting her posture to make insertion easier. Her resolve was clear.

Her ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠entrance glistened with a cloudy white mixture of her love juices and the spilled breast milk. Using that fluid as lubricant, my glans slowly spread her twitching folds. I pushed my hips forward toward her chest, and first the head, then the shaft, and finally the root were gradually swallowed deep inside her.

“Haaaang♡ It’s inside! Arwen’s cock!”

Sophia climaxed from the mere act of penetration. Her vaginal walls convulsed like burned muscle contracting, and her inner folds scraped roughly against the veins along my shaft. At the same time, she seized my wrist with the swiftness of an eagle snatching a fish. She probably needed something to hold onto for reassurance. Sophia gripped my wrist so tightly it felt like it might snap. I couldn’t even consider pulling away. It almost felt like I was the one being reverse-raped.

Breathing roughly, my younger sister squeezed my sides with her thighs while her breasts shook. I spoke to the girl panting beneath me.

“Actually, I’ve been wanting to ask you this for a while. I’d like you to call me oppa.”

Sophia turned her bright-red face slightly away.

“Hau♡ E-even now, you want me to call you oppa…”

I lowered my head and whispered directly into her ear. Perhaps because of my breath tickling her earlobe, a bead of sweat trickled down her twitching neck.

“I’m sure it’ll feel much better if you call me oppa while getting fucked, right?”

Even with my cock buried inside her pussy, Sophia somehow managed to look dumbfounded.

“Just from changing what you call me? Haung♡”

“I’m serious.”

Still looking skeptical, Sophia finally spoke the word with trembling lips.

“…Arwen oppa.”

She had attached the title that younger sisters use for the male member of their family who shares the same parents. Then, with an expression like her mouth was full of dust, she muttered that it felt like the first time she had ever called someone oppa in her life.

If the original Arwen could hear this, I’m sure a scene of him shedding emotional tears would play automatically in my head.

Sophia continued her first challenge.

“With Arwen oppa’s thing…”

She swallowed the rest of the sentence. Her face said she couldn’t bring herself to say any more. When a younger sister hesitates, isn’t it an ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠older brother’s duty to give her a push from behind?

I finished her sentence for her, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠urging her on.

“With what?”

Sophia scolded my mischievous question with furrowed brows, but she showed no further displeasure. After letting out a sigh of defeat, she cried out like the lewd female she was.

“Make your little sister feel good with oppa’s cock♡”

I stroked Sophia’s glossy short bob and gradually increased the pace of my hips.

“Well done, Sophia. Welcome to becoming true family with us.”

Together with Sophia—whose sense of family ethics had been thoroughly drenched in pleasure—the forbidden act of impregnating my younger sister continued.