ONYX FICTIONFusion of Desire · Mature Woman's Diary
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Fusion of Desire · Mature Woman's Diary

♙ Anonymous◷ 2026-09-17◉ 0

A 41-year-old housewife, Peihua, receives a mysterious package, and a realistic double-ended flesh stick permanently fuses into her lower body, completely changing her body and desires. Her repressed sexual needs are magnified endlessly, and when alone at home during the day, she sinks into self-exploration and intimate interactions with an adult college student. The story unfolds in the form of a first-person diary, describing in detail the physical and psychological shock brought by the bodily mutation.

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This is my diary. My name is Pei Hua, forty-one years old, an ordinary housewife.

At this moment, while typing on the keyboard, I slowly stroke the astonishingly thick meat rod between my legs with both hands.

Everything started more than two months ago.

I married my husband when I was very young. He is much older than me. After marriage, we had a son who is now in high school. The only regret in life is—my husband has almost no interest in sexual matters. It wasn't frequent before marriage, and it decreased sharply after having a child. Now, it has been several years since he last touched me.

He may already have little desire, but I am completely the opposite. My sex drive has risen sharply with age, and I think about it almost every day. Before marriage I was a bit plump, and after having children my breasts grew two cup sizes, reaching G cup. My ample breasts and butt made my body feel so mature it was about to overflow, yet nothing could truly satisfy me.

So I could only vent by masturbating a lot. It went from once every few days to once a day, then to doing it whenever I had free time. After seeing my husband and son off in the morning, I would open the computer and watch adult videos or comics, tugging at my dark, large nipples while using my fingers to pick at my soaked cunt. I didn't want to wrong my husband, so I could only satisfy myself with fantasies—fantasies of different men coming into the house under all sorts of excuses, pinning me down in the kitchen, bathroom, or master bedroom and using me thoroughly.

These fantasies should have remained just fantasies forever.

Until that day, I received a package.

The cardboard box was simple, with no sender information. Inside was a black, thick, realistic double-ended dildo, so lifelike that even veins and wrinkles were clearly visible. Both ends had thick glans, like a double-headed dragon specifically for female use.

I have absolutely no recollection of ordering such a thing. But when I held it in my hand, lust was almost instantly aroused. My hole had long been trained to be wet at any time. I took off my panties and gently inserted one end.

It submerges without any hindrance.

Just as I was enjoying the moment of being filled, an unprecedented burning pain suddenly surged in my vagina, as if scalded. I knelt on the ground, gasping for breath. When the pain slightly subsided and I tried to pull it out, it was already too late.

The penis could no longer be pulled out.

The area around the labia had completely fused with its surface skin, not a single seam visible, as if it were originally molded as one piece. I grabbed the penis and pulled hard, but clearly felt I was tearing off a piece of my own flesh—the nerves had also fully connected.

I was both angry and crying, struggling for hours to no avail. Until my husband and son came home, I had to cook with that thing still inside me. That night, I was grateful for the first time that my husband never touched me.

For the next few days, I lived in a half-dream, half-awake state. Unable to accept it, yet forced to accept it. Had I become a monster? Life had completely changed.

The only thing that hadn’t changed was her sex drive. Several days without masturbation had left her body unbearably itchy and restless, but her vagina no longer existed. The only choice was to play with this newly grown cock.

In an almost crazed state of mind, I put it on for the first time.

At that moment, I experienced for the first time the feeling of a man stroking himself, and also felt for the first time the ultimate pleasure brought by ejaculation.

After the first time, this penis began to bring even more endless desires than before. Like a teenage boy, I woke up hard every morning, even finding it difficult to urinate. My original small underwear couldn't contain it at all, so I often had to let it hang out.

After the husband and son go out, my masturbation time has completely turned into hand-job time. Sitting in front of the computer, watching the male performer in the video thrust in and out, I use both hands to stroke this thing of mine, which is even thicker than theirs. Looking down, I can see an extra black cock between my large breasts and hips. The visual stimulation of this inversion almost drives me crazy.

Like a monster, it can ejaculate repeatedly and become erect again, with semen that is copious, thick, and pungent. Often, by the end of the day, there are traces all over the house that need to be cleaned up before the family returns. Even more frightening is that it keeps growing bigger with my daily play—from the initial dozen or so centimeters, to over twenty, then exceeding thirty centimeters. Its girth has also reached the point where it takes both hands to encircle it, like hanging a small bottle.

I switched from one-handed to two-handed masturbation, my fingers sinking deep into the flesh, twisting and massaging back and forth. The stimulation was so strong it made me moan incessantly until the floor was sprayed with a pool of white, turbid fluid.

At the same time, the woman’s sex drive did not disappear, but instead was amplified. Her sensitive nipples now made the flesh rod leak fluid just from rubbing against her underwear; her anus, which had only occasionally been stimulated before, had now become extremely sensitive, as if it had taken over the function of the vagina. For a good while, I clipped my two big nipples with clothespins, stuffed a super-large massage wand into my anus, and frantically stroked the flesh rod with both hands, making it a fixed daily routine. It was as if I possessed the desires of both a man and a woman at the same time.

While the body was changing, the mind was also collapsing. Before, I still thought I couldn't betray my husband, but now I was completely dominated by lust.

Playing at home gradually couldn't satisfy me anymore.

About a month ago, I started having a new schedule. After my husband and son left the house, I put on a silver glossy bikini I bought online — I deliberately bought a B cup one, which could only barely cover my nipples, with the straps digging deeply into my flesh. The tiny panties got stuck in my fat ass, and the cock simply couldn't fit in, so I had to leave it sticking out. Then I put on black thigh-high heeled boots, and finally a long windbreaker.

From the outside she looked like a tightly wrapped middle-aged woman, but inside it was a tiny bikini and a huge thing. Just walking down the street, the feeling of the glans rubbing against the trench coat made me almost cum. Once, I really came right there on the street; semen ran down the hem of the trench coat and onto my long boots, and I had no choice but to run home in a sorry state.

Then I began having sex in the park with some homeless adult men. Most of them didn’t ask too many questions; as long as they could do it, that was enough. The first time they saw my outfit under the trench coat, they would freeze, but their bodies were obedient enough. I would take the initiative to kneel down and give them oral sex, then let them use my asshole. My sense of shame seemed to have completely disappeared; while doing it, I would proactively call them “darling” or “husband,” and their cocks seemed possessed as they kept ejaculating nonstop. Later, word got around, and I had no choice but to change targets.

I started turning my attention to students at nearby universities.

Those guys in their early twenties, with young, strong bodies and heavy curiosity. I would actively approach them near campus or in cafes, inviting them home with the charm of a mature woman. Most thought I was a transvestite or had special kinks, and I didn't explain. Back home, I would give them oral, let them use my asshole, while stroking my own increasingly large cock. Sometimes they would call classmates to join, with up to seven or eight college students taking turns interacting with me at once.

The neighbors just thought I was tutoring students with their homework, completely unaware of what was truly happening inside the house.

This afternoon was the same as well. After several college guys fully released on me, they left, and their stuff was still left inside my belly. My rationality grows blurrier day by day, and I can only use the brief moments of clarity after ejaculation to write these words down.

This penis is now nearly forty centimeters long. I started seriously thinking that one day I might really be able to suck myself. Just imagining it makes me tremble with excitement. If someone were also using my asshole and cleavage at the same time, I might truly lose my mind from pleasure.

It's hard again.

Before I could finish typing, I had to continue recording with one hand while using both hands to stroke it. The pink lace panties were already soaked through with pre-ejaculate fluid.

I can no longer live without it.

Another week passed.

The penis grew a bit longer. I carefully measured it with a soft ruler; now when erect, it was already over 42 centimeters, so thick that I could barely wrap both hands, one over the other, around the middle section. The glans was as big as a small fist, its color a deep, purplish hue. Each ejaculation produced so much that I had to lay old towels on the floor beforehand; otherwise, cleaning up would take the entire afternoon.

After the husband and son go out, I almost stop wearing clothes. I only casually wrap an apron around my waist, the front pushed high by that thing, while the back is completely bare. The apron ties dig deeply into the flesh of my waist and hips, and as I walk they tremble up and down.

Today I arranged for three college guys to come over.

They were among the most frequent visitors in that last group, all in their early twenties, with sturdy bodies and the curiosity and desire unique to young people in their eyes. One of them was named A Zhe, from the sports department, with broad shoulders; another was Xiao Yu, wearing glasses, looking refined, yet the roughest when he made a move; and another was A Jie, who did not talk much, but could always go for a long time.

When the doorbell rang, I was already painfully hard.

The moment the door opened, their gazes fell squarely on my lower body. The apron couldn't cover anything at all; that thing was standing straight up, with clear fluid already seeping from the tip, forming thin strands.

“Auntie has gotten bigger again today...” A Zhe sighed softly, his voice hoarse.

I didn't speak, just turned sideways to let them in. As soon as the door closed, I actively knelt down.

The three young cocks quickly got hard. I took them into my mouth one by one, carefully licking every vein and the corona ridge with my tongue. A Zhe’s was the thickest, Xiao Yu’s was slightly curved, and A Jie’s was the longest. I buried my face between their legs, making muffled wet sounds, while my own hand kept stroking that giant thing up and down without stopping.

They quickly pinned me down on the living room carpet.

A-Jie entered my ass from behind. It had already been trained by myself to be soft and wet; he slid in fully almost in one go. I let out a long moan, my cock throbbing violently, releasing a small stream of pre-cum. Xiao Yu crouched in front of me, putting his cock in my mouth; A-Zhe grabbed my hand, making me continue stroking him.

Three young cocks used my body at the same time.

I felt like a tool nailed to the ground. When my asshole was pushed to the deepest point, my own cock would uncontrollably convulse violently, shooting streams of semen onto the carpet, so much that it almost formed a small puddle. Ah Zhe cursed softly and sped up his thrusts. My breasts were kneaded and slapped by them in turn, my nipples both painful and pleasurable, hard as if they were about to be torn off.

Who knows how long had passed. Ajie came first inside me. The moment the warm liquid poured in, I myself climaxed again, and the flesh rod shot even more fiercely. Xiaoyu then came in my mouth, and I swallowed it all. Only at the end did A Zhe come, and semen splattered all over my face.

When they rested, I was still trembling slightly. The cock was still half-hard, and from time to time a little white fluid seeped out.

“The thing under Auntie... is really exaggerated.” Xiao Yu wiped his sweat while staring at it. “Next time, can we try... using it?”

I was taken aback for a moment.

It wasn't until this moment that I truly realized—this thing isn't just my toy; it can also be used by others.

I nodded.

Ah Zhe immediately got excited. He had me lie on my back, straddled my waist himself, aimed that huge thing at his own rear hole, and slowly sat down. His expression changed from endurance to pain, then slowly to a twisted pleasure. When he fully swallowed it, I clearly felt my cock being enveloped by the warm, tight intestinal walls.

That feeling was too intense.

I came almost instantly. A large amount of semen directly poured into A Zhe's body, so much that his lower abdomen slightly bulged. He roared lowly and came as well, his semen landing on my lower abdomen and breasts.

Xiaoyu and Ajie took turns trying it once. Each time the feeling of being entered, tightened, and having semen squeezed out was ten times stronger than when I stroked myself. I began to understand why some people become addicted to being used.

That day when they left, it was already evening. I lay in the messy living room, my body smelling of semen and sweat everywhere. My cock had softened somewhat but still hung heavily between my legs.

I got up and started cleaning up.

While mopping the floor, I suddenly thought—what if one day, this thing keeps growing, grows long enough for me to suck on it myself... or grows long enough to penetrate two people at the same time...

Just imagining it makes it hard again.

I gave up cleaning and sat back in front of the computer, typing while slowly stroking with both hands.

The diary must still be continued.

Because I knew this was only the beginning.

The body is still changing. Desires are still expanding. And those young college students seem to be relying more and more on me, this 'special auntie'.

I can no longer tell whether I'm using them or they're using me.

Or, perhaps we are all just being dragged deeper by this mysterious cock together.

Ten days passed.

I no longer dare to measure it.

The end of the soft tape measure was pushed open by it, the number stopping at forty-eight centimeters. The thickness was even more exaggerated; with both hands overlapping, I could only barely grasp the thickest part in the middle, my fingertips not even touching. The glans was as large as a fist, dark to the point of being black, covered with bulging veins. Every time it became erect, it would slightly bulge my lower abdomen, swinging heavily when I walked, hitting the inner thighs until they were red and hot.

The amount of ejaculation has also reached a frightening level.

A full orgasm could fill a small bowl with semen. Thick, white, and fishy, it would form a small puddle when it hit the floor, and it would take a long time to wipe clean. I began laying out large old sheets and towels in advance in the living room and master bedroom, otherwise there would be no time to deal with it before Mr. and my son came home.

Today I arranged for five college students.

Ah Zhe, Xiao Yu, and Ah Jie were still the regulars, joined by two new faces—Ah Kai from the sports department and Ah Han from the medical school. When they entered, I was already completely naked, wearing only black over-the-knee boots. That thing stood straight up, the tip continuously oozing clear fluid, forming long, thin strands.

As soon as the door closed, they surrounded us.

I willingly knelt on the center of the carpet, taking each of their cocks into my mouth in turn. Five young things took turns filling my mouth; I worked hard to lick them hard and wet, while my own hands continuously stroked up and down that giant member. Prostatic fluid made my fingers slippery and sticky; with each stroke, my asshole clenched in response.

Soon they pinned me down.

A-Jie entered my ass from behind; when he slid in fully, I let out a long whimper. A-Zhe straddled my face, making me continue giving him oral. Xiao Yu and A-Kai each grabbed one of my hands, making me stroke them. A-Han stared at my member, his eyes gleaming.

“Auntie... can I use the back to eat it today?” he asked.

I nodded.

Ah Han immediately straddled me, aligning with his own back entrance, slowly lowering himself. His expression shifted from endurance to pain, then gradually to a nearly overwhelming pleasure. When he fully took it in, I clearly felt my cock tightly gripped by his warm and tight intestinal walls.

That feeling was too intense.

I came almost instantly. A large amount of semen directly poured into A Han's body, so much that his lower abdomen noticeably bulged, and semen overflowed from where we were joined, running down his thighs. He roared lowly and came as well, his semen landing on my lower abdomen and breasts.

The others took turns trying once.

The feeling of being entered, being clenched tight, being milked of semen each time was infinitely more intense than when I stroked myself. I began to understand why some people become completely addicted to being used. My cock was no longer just my organ; it had become a tool for others' pleasure, and the pleasure I derived from it far surpassed any previous masturbation.

They came again and again.

My mouth, asshole, breasts, and lower abdomen were all covered in semen. My own cock had ejaculated four times, each time more intense and longer than the last. Finally, I lay on the carpet, my body trembling violently, my cock still gently throbbing, occasionally squeezing out a bit more milky fluid.

When they rested, someone took out a phone and snapped a few photos.

“Only for us to see.” A Zhe promised.

I no longer had the strength to oppose.

By the time they left, it was already completely dark. I lay alone in a mess, smelling the room full of semen and sweat. The cock had softened somewhat, yet it still hung heavily between my legs, occasionally twitching.

I got up and started cleaning up.

Mopping the floor, changing the bedsheets, throwing the semen-stained towels into the washing machine. While doing these things, I suddenly felt a strange sense of calm—as if this was my real daily life, while those moments pretending to be a normal wife and mother were just temporary disguises.

Halfway through cleaning, the cock hardened again.

I gave up continuing to clean and sat back in front of the computer. While typing, I slowly stroked it with both hands. The pink lace panties had long been tossed aside, now leaving it exposed to the air, the glans continuously seeping new fluid, dripping beside the keyboard.

I started seriously thinking about a question:

If it keeps growing, reaching fifty centimeters, sixty centimeters... will I still be able to walk normally? Will I be able to wear any pants? If one day it grows so long I can suck it myself, or even penetrate two people's bodies at the same time...

Just imagining it made me cum again.

Semen sprayed everywhere.

Panting, I continued typing.

The diary must be continued.

Because I knew that the changes in my body were not over yet. Those college students seemed to be increasingly unable to live without me, this "special aunt." They began to make regular appointments, and sometimes even brought new classmates with them.

I couldn't tell whether I was using them, or they were using me, or if we were all just being dragged step by step by this mysterious cock into a deeper, more irreversible place.

Before the husband and son come home, I must clean up all traces.

But sometimes I think—what if one day it is too late?

If they pushed the door open and saw me kneeling on the ground, my lower body dragging that thing, my body covered in someone else's semen...

Just the thought of it makes me tremble with excitement.

The penis hardened again.

I put down the keyboard, gripped it again with both hands, and began a new round of stroking.

Diary, to be continued.

Three days later.

I measured once.

The soft tape measure was completely insufficient. I had to use a steel tape measure, measuring from the base upward; the number stopped at fifty-three centimeters. When erect, it curved upward, the glans almost touching my chest. The thickness was even more exaggerated; even with both hands overlapping, I couldn't wrap around it, and I had to exert force to sink my fingers into the flesh.

Walking had already become difficult.

It's too heavy. When hanging down, it slaps against the inner thighs, leaving red marks; when erect, it pushes the lower abdomen way out, forcing me to walk with a slight forward lean to avoid losing balance. I started moving around the house naked, not even bothering with an apron. When my husband and son are home, I barely cover it with a loose robe, but the outline of that thing is still faintly visible. Fortunately, my husband hardly touches me, and my son is absorbed in his own world, so no one has noticed the abnormality yet.

Today I made an appointment with seven college students.

Ah Zhe and the others brought two new ones. Seven people crowded into the living room, the air quickly becoming scorching hot. I knelt in the center of the carpet, giving them oral one by one, licking all seven young cocks hard. My own was fully erect, the tip constantly leaking fluid, dampening a small patch of the carpet.

They were no longer satisfied with only using my mouth and ass.

Someone suggested taking turns sitting on top.

I lay on my back, letting them take turns straddling my waist, slowly swallowing that huge thing into their back hole. Each time it was fully swallowed, I would uncontrollably ejaculate. The volume of semen was already terrifyingly large; after being poured in, it would overflow from the joining point, run down their thighs, and drip back onto my own lower abdomen and chest.

Ah Zhe lasted the longest.

He went in and out for more than ten minutes, his expression changing from pain to near-crazy pleasure. I could feel my cock being clamped tightly by his intestinal walls, and every thrust brought intense friction. In the end I came so violently that he was directly filled until his lower abdomen bulged, with semen spraying out from the gaps.

After the others had each taken a turn, they began to treat me in a rougher way.

Someone grabbed my breasts, kneading and slapping them hard; someone shoved their fingers into my mouth for me to suck; someone gently stepped on that thing of mine with the sole of their shoe, feeling it throb under the pressure. I accepted it all. Shame had long been washed away by desire, leaving only an endless craving to be filled, used, and drained.

They came again and again.

My own cock was almost empty from cumming, yet it remained semi-hard, occasionally squeezing out a bit of thin fluid. Finally, I lay in the mess, my body covered everywhere with a mixture of semen, sweat, and prostate fluid, even my hair stuck together.

Before they left, someone used a phone to take more photos and short videos.

“Auntie, we’ll come again next week.” A Zhe said, “Maybe we’ll bring a few more people.”

I nodded.

After the door closed, only I remained in the room.

I didn't clean up immediately.

Instead, I just lay there, feeling the lingering afterglow of pleasure within my body. My cock twitched gently, occasionally seeping out a bit of white fluid. I reached out and grasped it, slowly stroking up and down, imagining if one day it grew to sixty centimeters, seventy centimeters... Would I still be able to stand, live a normal life, or would I completely become a vessel existing solely for this thing.

Just these thoughts make it hard again.

I got up and walked to the mirror.

In the mirror, the woman's hair is disheveled, her face, chest, and lower abdomen all covered in dried semen traces. The dark, huge object at her lower body stands erect, forming a stark contrast with her plump white breasts and round buttocks. Looking at myself, I suddenly feel unfamiliar, yet exceptionally familiar—as if this is my true appearance.

I sat back down in front of the computer, typing while continuing to stroke myself.

The diary must be continued.

Because the change was still continuing.

Those college students seemed to have already treated this place as a fixed spot for release. They became more and more skilled, more and more knowing how to make me cum the most, and more and more knowing how to use my body for their pleasure. And I, in being used time and again, felt my rationality being gradually devoured by this cock of unknown origin.

The time until the husband and son come home is getting closer and closer.

I must clean everything up before that.

But sometimes, halfway through cleaning up, the cock gets hard again, forcing me to stop what I’m doing and deal with it first.

Just like now.

I put down the keyboard, gripped it again with both hands, and began a new round of stroking.

Semen sprayed out once more, landing on the already messy floor.

Gasping for breath, I looked at those white, turbid traces and suddenly had an even more dangerous thought—

If one day, I stop cleaning up?

If I just let my husband push the door open and see all this...

Just imagining that scene makes me tremble with excitement again.

The penis throbbed again.

Diary, must go on.

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