A Pillowside Moon (Sisters ABO) - Chapter 4

Once an Alpha formed a knot, she could not immediately pull out of an Omega’s body. Liu Changxi felt pulse after pulse of scalding heat spraying against her cervix, making her waist go so weak that she trembled. It was both unbearably pleasurable and overwhelming. Her entire body tingled helplessly, and she could barely remain seated atop her sister.

Perhaps because Liu Chuhan had knotted on her very first orgasm, she seemed to have ejaculated an extraordinary amount.

As Liu Changxi gradually recovered from her climax, she felt unbearably full and hot inside. Tears still clinging to her eyes, she involuntarily lowered her gaze toward her abdomen.

Her normally smooth, flat stomach was now slightly swollen, as though it had been completely filled. The sight was indescribably obscene.

Looking like this…she almost appeared to have been fucked pregnant by her sister…

The thought sent another indescribable thrill through Liu Changxi. Her body responded honestly. Her pussy, still spasming from her orgasm, involuntarily tightened again and swallowed her sister even more deeply.

Liu Chuhan’s knotted cock remained trapped inside her sister’s body. It was the first time she had ever cum so violently, and she was still dazed by the overwhelming pleasure when she suddenly felt her sister squeeze her even more tightly.

Liu Changxi’s cervix greedily sucked at the head of her cock. A numbing sensation shot from Liu Chuhan’s tailbone throughout her entire body. She shuddered and released a breathless moan from the stimulation.

“Mmm…”

She instinctively thrust her hips, seemingly attempting to escape the pleasure pursuing her, but through her daze, she suddenly heard her sister’s soft whimper.

Liu Changxi had not expected her sister to thrust into her so suddenly. Liu Chuhan’s knotted cock was completely trapped inside her narrow, wet pussy, while her cervix was already unbearably sensitive from being filled with semen.

Caught entirely off guard by her sister’s thrust, the pleasure that had yet to fade surged back with overwhelming force. It felt so good that Liu Changxi nearly began crying again.

“Uhn…slowly, Sister…” she whimpered, begging pitifully.

She had completely lost the wanton seductiveness with which she had tempted her sister earlier. At a glance, anyone might have mistaken her for a fragile Omega being pinned down and fucked to tears by her own sister.

“You’re still cumming… Wait a little before fucking me again, all right? Mmm…there’s so much…”

Listening to her sister’s soft, obedient pleading, Liu Chuhan fell into a daze.

It almost seemed as though the girl who had sat astride her and begged to be filled with her cum had not been her sister at all. This sweet and adorable appearance seemed far more like her sister’s true self.

The innocent, lovely girl outside of bed and the bewitching, shameless temptress between the sheets—which one was the real Liu Changxi?

Liu Chuhan wondered hazily. Hearing her sister beg for mercy, she obediently stopped moving and waited for the lengthy ejaculation to end.

Yet something felt strange.

Liu Chuhan had already knotted and ejaculated, so her rut should ordinarily have eased slightly. Instead, her entire body remained scorching hot, and even her breath felt feverish.

The intense heat burned her mind into a haze, making coherent thought nearly impossible. Yet her perception of the outside world became increasingly acute. She could even distinguish every change in pressure and rhythm as her sister’s pussy twisted, sucked, and clenched around her cock.

A normal rut should not feel like this.

The only possible explanation was the drug her sister had given her.

Liu Chuhan felt a headache coming on. She had no idea what her sister had drugged her with. An Alpha undergoing an ordinary rut would never become as weak as she was, pinned beneath an Omega and incapable of moving.

As she considered this, Liu Chuhan suddenly frowned and bit her lip. Belatedly, a realization occurred to her:

Considering her current condition, could she say that she had been raped by her own biological sister?

The unexpected thought startled Liu Chuhan. Yet for some reason, she felt no disgust whatsoever.

Instead, it faintly excited her.

Even her cock responded by swelling larger inside Liu Changxi, making her sister begin panting delicately again.

“Ah…you’ve gotten even bigger, Sister…”

Liu Changxi gasped as the rigid cock pressed tightly inside her. She gazed at Liu Chuhan with watery eyes, wearing an utterly innocent expression.

“Did you think of something? You’re so hard…mmm, ah…your knot hasn’t even gone down yet…”

Her sister’s question seemed to drag Liu Chuhan’s hidden desires into the open. Countless images flashed through her mind, and her face immediately burned.

After everything that had happened, Liu Chuhan could no longer avoid her truest desires.

From the moment she had ejaculated inside her sister’s uterus, cracks had appeared in the moral restraints binding her. Now her sister had merely brushed against them, and those restraints shattered completely, no longer capable of imprisoning her.

Her body was telling her with absolute honesty:

You enjoy having sex with your younger sister.

You love the way her pussy bites down around your cock and refuses to let go.

You love seeing her abdomen bulge slightly while she takes your cock.

You love watching her cry as she climaxes on top of you.

You love it when she clings to you and begs you to cum inside her.

You even enjoy being pinned down and raped by her.

You are hopelessly in love with her, even though this is incest.

Her cock hardened whenever her sister touched her. She had knotted inside her so quickly, continued ejaculating without wanting to withdraw, and responded to Liu Changxi in countless undeniable ways.

Every reaction forced Liu Chuhan to realize that she truly desired an incestuous relationship with her sister.

Not even morality could suppress her longing to mate with Liu Changxi.

The Alpha’s cool, gentle woody fragrance abruptly spread throughout the room with astonishing speed. It steadily overwhelmed the rose fragrance that had previously occupied the entire space until their scents ultimately blended into one.

When Liu Changxi smelled her sister’s pheromones suddenly become many times stronger, her previously lucid mind immediately dissolved into a haze. The scent gland at the back of her neck began swelling and frantically releasing her pheromones.

She had entered full heat.

Her pussy, which had still been immersed in the lingering pleasure of her orgasms, began developing an endless, unbearable itch.

No matter how deeply her sister penetrated her or how much semen she released inside her, Liu Changxi still could not get enough.

Her body craved further affection. She wanted to be kissed and caressed. She wanted to lie beneath her sister and moan.

At precisely that moment, Liu Chuhan’s knot began slowly subsiding.

Liu Changxi’s body had already grown accustomed to being completely stretched and filled. As the knot diminished, emptiness immediately flooded through her. She instinctively tightened around her sister’s cock and even began moving her hips again, riding it of her own accord because she did not want it to leave.

“Don’t…don’t pull out… Give it to me…” Liu Changxi pleaded tearfully.

But her sister’s hands had already settled upon her waist.

Through her daze, Liu Changxi suddenly felt the world spin. In the next instant, her position had been reversed, and her sister had pinned her beneath her.

Her Omega instinct to be possessed reacted intensely to her sister’s dominant position. The ache in her lower abdomen became stronger, while her cervix itched unbearably. All she wanted was for Liu Chuhan to fuck her hard and claim her completely.

But Liu Chuhan did not do as she wished.

She pinned her sister against the bed and began withdrawing her cock slowly but resolutely.

Sensing her intention to leave, Liu Changxi immediately clenched her pussy and desperately tried to prevent her from pulling out.

The delicate Omega had lost the domineering confidence with which she had initially seduced Liu Chuhan. She could only wrap both arms weakly around her sister’s neck and sob brokenly.

“Don’t leave, Sister… Fuck me, please…don’t go… You can fuck me however you want… Please don’t abandon me…”

Her sister looked utterly pitiful as she cried, gazing at Liu Chuhan through tear-filled eyes.

Feeling both heartbroken and helpless, Liu Chuhan could only lower herself and gently kiss the corners of her eyes.

“Be good, baby. Let me pull out first, all right? Sister won’t abandon you. Don’t be afraid.”

Liu Changxi looked at her timidly. “Doesn’t it feel good to fuck me, Sister? Why do you want to pull out?”

Hearing her innocent-looking sister say something as explicit as “fuck me” made Liu Chuhan feel as though flames were burning through her body.

Her Alpha instincts urged her to abandon all restraint and fuck her sister until neither of them knew whether it was day or night. Yet her love for Liu Changxi allowed her to retain one final trace of reason.

She inhaled deeply and explained gently, “I came so much inside you. If we continue like this, you’ll become uncomfortable. Let me pull out first, all right? Sister will help clean you.”

Liu Changxi neither agreed nor refused.

She kept both arms around her sister’s neck, her fingertips wandering over Liu Chuhan’s skin. Only after finding the swollen scent gland at the back of her neck did she finally seem reassured.

She gave a quiet hum and obediently relaxed, allowing her sister to withdraw slowly from her body.

Feeling Liu Changxi touch the back of her neck, Liu Chuhan did not know whether to laugh or sigh.

A swollen scent gland indicated that she had entered a full rut. At this stage, even suppressants would be useless. Despite her mind being completely muddled, this little temptress had still remembered to prevent Liu Chuhan from leaving to use suppressants.

She had truly thought of everything.

Then again, if a full rut did not drastically increase an Alpha’s physical strength, Liu Chuhan would not have had the energy to pin her sister against the bed. She probably would still be lying motionlessly beneath Liu Changxi and serving as nothing more than a living dildo.

Silently grumbling to herself, Liu Chuhan carefully withdrew from her sister’s body. Her cock was rather large, so she feared that the slightest carelessness might injure Liu Changxi.

Even though Liu Changxi had relaxed, the natural tightness of her pussy still made withdrawal difficult. Her inner walls pressed densely against Liu Chuhan’s thick length, creating indescribable friction and pleasure.

Suppressing the urge to thrust back inside, Liu Chuhan bit her lip and slowly pulled out.

The friction made Liu Changxi whimper continuously. She twisted restlessly beneath her sister while Liu Chuhan struggled both to keep her still and to restrain herself.

By the time she finally withdrew completely, Liu Chuhan’s pale forehead was covered in fine beads of sweat.

She released a relieved breath, brushed back her damp hair, and kissed her sister lightly beside the lips.

“Sister is going to get a towel. Wait here.”

With that, she rose from the bed.

She returned with a clean towel. Pursing her lips in embarrassment, she gently spread her sister’s long legs apart.

“Sister will wipe you clean.”

Her sister looked entirely willing to let Liu Chuhan do anything she wanted. She obediently opened her legs, exposing her thoroughly disheveled pussy.

The delicate pink flesh had turned a bewitching crimson after the intense penetration. The entrance stretched open by Liu Chuhan’s thick cock had not yet closed and was slowly releasing white semen, yet the seemingly endless cum refused to drain completely.

The first thing Liu Chuhan saw was this obscenely erotic sight, making her face flush.

She was responsible for the mess before her. She had ejaculated so much into her sister’s belly, but because her semen was too thick to flow out smoothly, she would have to use her fingers to scoop it from Liu Changxi’s pussy.

Tormented by her heat, Liu Changxi refused to remain still even while her sister cleaned her.

She moaned incessantly, first begging Liu Chuhan to fuck her with her fingers and then trapping her sister’s hand between her thighs so she could grind against it herself.

After much difficulty, Liu Chuhan finally managed to clean her pussy despite the little temptress’s relentless harassment.

She had barely tossed the towel aside when she heard her sister call sweetly, “Sister.”

Liu Changxi often used this same tone whenever she acted spoiled. Remembering that, Liu Chuhan’s heart softened. She naturally leaned closer and asked gently, “What is it?”

As soon as Liu Chuhan came near, Liu Changxi reached out and hooked her arms around her neck. Her smooth, pale legs wrapped around her sister’s waist, pressing their bodies tightly together.

“I’m empty now…” she whispered beside Liu Chuhan’s ear with a seemingly shy smile, her warm breath caressing her skin. “You can fill Changxi’s belly with your cum again.”