My promise with my sister

page views:1 Publication date:2023-06-11 13:32:35

This post was last edited by jkk5056 on 2021-5-21 18:04.

I remember when I was little, my sister and I read a book called "Boys and Girls Are Very Different."

As the title suggests, the book introduced the physical structure of boys and girls. For us, who were still ignorant about gender, this book sparked our curiosity.

We turned to the chapter on puberty, which talked about the physiological changes in males and females after entering puberty, and the pages were illustrated with nude pictures of grown-up boys and girls. My sister and I stared at it intently. At this time, our parents had already gone out.

"It says that boys' penises will start to grow hair when they grow up, how amazing!"

my sister exclaimed. At that time, my sister was only in the third grade of elementary school. She had a short, upturned ponytail, straight bangs and bouncy sideburns. She was pretty and cute, with innocent, bright eyes. Her body seemed slender, but she didn't yet have the hourglass figure of a woman. Today she was wearing a sleeveless yellow dress, her fair shoulders exposed, and her beautiful collarbone visible through the neckline.

"Really?"

I pulled down my pants, looking at my small, peanut-shaped penis.

My sister reached into my crotch, curiously fiddling with it.

"I really want to see what my little penis looks like with hair."

From my sister's loose neckline, I saw her flat chest, like a boy's with only two small nipples. I slipped my hand under her dress and stroked her breasts.

Her dress was also lifted, revealing white lace panties

. "When you girls grow up, you'll grow breasts like Mommy's. I really want to see what your breasts look like."

"Hmm, then when we grow up, let's look at each other's bodies together."

"Okay, it's a deal."

My sister's hand was still playing with my penis when suddenly, a strange tingling sensation came from it.

"Ah…?

" "Sister, what's wrong?" "

My brother's penis is hard..."

I looked back into my pants, and my penis was indeed erect and swollen, with the glans automatically sliding out from under the foreskin.

"How strange...it hardened on its own."

"Do all boys do this?"

My sister brought her eyes close to my penis and gently pinched it with her hand.

"Ah..."

"What's wrong, brother?

" "Your finger is pressing on a strange spot..."

My sister's index finger was pressing on a spot on the lower edge of the glans, and all the stimulation was surging from there. Perhaps that's why my penis is hard.

"I'm sorry, brother, does it hurt?"

My sister released her fingers, and my penis trembled between her fingers.

"Your penis is throbbing, is it okay?

" "It's okay, it actually feels quite good, can you continue?"

My sister gently pinched my penis again, her index finger kneading and twisting that comfortable spot.

Feeling this intense stimulation for the first time, my body involuntarily twitched.

"Ah...

Brother, are you alright? You look a little strange."

"Is it because it feels so good...?

" "Is it really that good?

" "Maybe you can too. Take off your panties, and I'll help you."

The younger sister stopped playing with my penis and slowly pulled down her panties. I leaned closer to her, and the moment my hand reached out, she suddenly clamped her thighs together.

"Still so shy...?

" "You're not even shy about touching my little penis, and I'm your brother, it shouldn't be a problem if I touch it." "

But ...?"

"If you don't want it, then forget it."

The younger sister hesitated for a moment, then seemed to make up her mind.

"Okay."

She slowly opened her thighs, and at that moment, a slight slit was revealed between her legs. I told her to lean back slightly, and the full view of the slit was revealed before me. I gently parted the opening with my fingers, and the pink flesh inside gradually separated until the innermost cherry-colored membrane.

"Wow...?"

It was the first time I'd ever seen a woman's reproductive structure so closely, and I couldn't help but marvel. When my fingers slipped between her legs, her body suddenly trembled.

"What's wrong? Does it feel good?

" "Here… I feel something."

She propped herself up with one hand, pointing to her sensitive spot above the vaginal opening—a crisscrossing fold with a raised point at the intersection. I poked that spot with my index finger.

"Is it here?

" "Ah…yes, right there."

My sister trembled again, so I climbed to her side, supporting her waist with one hand and rubbing that area with the fingers of my other hand.

"Does it feel good?

" "Mmm…it feels so good…"

A blush spread across her face, and she leaned weakly against me. Seeing her so vulnerable for the first time, a strange excitement welled up inside me.

"Then you should massage my penis too, otherwise it's unfair that only you get to enjoy it." Hearing my

complaint, my sister blankly used her fingers to massage my penis again, and the tingling sensation returned.

During this time, my mind seemed to enter a state of emptiness, my body enjoying my sister's ministrations, my mind wandering with the sensations in my penis.

Suddenly, a powerful stimulation overwhelmed my entire body, and I couldn't help but lean against my sister, my penis contracting strongly and repeatedly, as if trying to release something, but nothing came out, just a fleeting sense of pleasure.

At that moment, my fingers, which were caressing my sister's private parts, inadvertently pressed down, and my sister cried out. Then, a liquid that looked like urine splashed out, getting on my fingers and leaving a puddle on the floor.

"Why did you pee? You've got your pee all over my hand."

"Ah... I'm sorry, brother, I couldn't control it, it just came out on its own."

My sister quickly apologized, and I was too lazy to scold her. We had to clean the floor before Mom and Dad came back. I told my sister to get a rag. While waiting for my younger sister to bring a rag, I inadvertently glanced at the picture book next to me, "Boys and Girls Are So Different," stuck on the chapter about puberty.

Back then, I wondered what my sister would be like when she grew up. Judging from our first experience together, the book seemed to be hiding something, though I didn't know what it was at the time. But eventually, through exposure to classmates and the internet, I understood what sex was.

Now, I'm in my third year of junior high, and my sister is in her second. When she entered higher grades, she became less talkative with me, perhaps because our interests and values differed.

Time seems to fly by; my sister's breasts are developing, her hips are widening, and she's already developing a woman's hourglass figure. She has a faint fragrance about her and seems even more beautiful.

My sister once said that we should look at each other's bodies again when we grow up, but now I think it was just a childhood joke. How could my sister possibly show me her body now? So I buried that promise deep in my heart. But then…

one day after school, I came home and threw my schoolbag into my room. My parents don't get off work until 8 PM, and my younger sister often hangs out with her friends after school, not returning home for dinner until 6 PM. So, I'm usually home alone at this time. I put the dinner my parents prepared into the rice cooker to steam.

*Click*.

Suddenly, I heard the door open. It was my sister.

"Hmm? Why are you back so early?

" "My friend said she had to go home early, so I came back too."

My sister still likes to wear her hair in a ponytail, her bangs swept to one side, the sideburns highlighting her youthful face. Her slender figure hasn't changed, but she's grown much taller since third grade, and her body has developed a sexy curve. She wore her school's white uniform and black pleated skirt, carrying her schoolbag as she walked into her room.

Perhaps it was because my sister came home early, but I suddenly remembered our old promise. And then I realized how daring I had been back then. But those were truly wonderful times.

Honestly, I haven't seen my sister's body yet. Maybe I want to relive that experience. I actually went upstairs to my sister's room to see what she was doing.

Her door wasn't closed, and I could see her lying on her bed from the side. Because her back was to me, I couldn't see what she was doing, but she seemed to be scrolling through her phone. She must have forgotten our promise, or maybe she remembered but couldn't keep it.

I stood there, staring at my sister's high, shapely buttocks through her pleated skirt, her hips and slender waist forming a perfect curve, her feet in white socks swaying in the air. I struggled internally for a long time, wondering whether to go in and call her. Finally, I mustered up my courage and went into her room.

"What are you doing, sister?

" "Ugh!"

She jumped in fright, her panicked look quite cute.

However, what she dropped on the floor shocked me.

—It was that book from back then, "Boys and Girls Are Very Different."

How could this be? I remember this book going missing when I was in middle school, but how did it suddenly appear in my sister's room?

The fact that it fell out means my sister was just looking at it. Did she hide it? But why?

My sister turned around, smiling awkwardly at me, her legs trembling nervously, as if she anticipated what was about to happen. I seemed to guess what she was thinking, and a thought of seizing the opportunity arose in my mind, but seeing her pitiful appearance, I felt guilty.

The air in the room seemed to freeze for a long time. I tried to break the awkward atmosphere, when suddenly, the rice cooker switch popped up.

"Ah, the rice is ready! Come down and eat!"

I walked out of my sister's room, while she watched me leave with a flustered expression. She probably knew I had seen the book, but I walked out without saying a word. Thinking about it now, it was really too unnatural. Perhaps if I had just gone with the flow, I could have fulfilled my inner desires. I now regret missing my chance.

I placed the steamed rice and dishes on the living room table, added a bowl of rice, and sat down on the sofa. Soon after, my sister came down, added a bowl of rice, and sat on the sofa next to me.

The atmosphere in the living room remained heavy. I didn't know what to say to break the silence, so I decided to turn on the TV to liven things up. Just as I was about to do so, my sister suddenly spoke.

"Brother, you actually saw it, didn't you? That book from earlier."

"Huh?"

I had expected my sister to say that; after all, this matter eventually needed to be resolved, but facing it directly still made me flustered. I thought for a long time before finally deciding to voice my question.

"Yes, I saw it, but why was it with you?"

My sister was silent for a while; perhaps her feelings were similar to mine.

"You should still remember what happened back then, because every time I see this book, it reminds me of that embarrassing past, so I hid it. I just don't know why I took it out today."

"You should have thrown that book away, and what happened back then… I thought you had forgotten."

"So you still remember? How could I forget? The reason I didn't throw it away is because we made a promise. Because it sounded like I was just saying it casually back then, you probably forgot."

My sister gripped her rice bowl, her eyes avoiding my gaze. She still remembered that promise. Was she bringing it up now because she wanted to keep her promise? Just as I was thinking this, my penis was rock hard.

"I remember that promise, but…"

Hearing this, my sister suddenly looked at me in surprise, then hesitated and lowered her head, looking like a lover about to confess .

"Then, then, do you want… to… look at each other's bodies again?"

"Huh?"

These words seemed to come from the last of her shame, completely piercing my heart with desire. My instincts drove me to agree, but my pretense faltered.

"But...but we're not like before. Now it might not just be about looking. What if you're pregnant...?

" "That's why I came home early today. Today is my safe period, and there are still more than two hours before Mom and Dad come home." "

So you've already...planned everything."

My sister is really going all out. I have to admire her courage, but compared to her, I'm so cowardly now that I'm grown up. I didn't expect her to take the initiative this time.

"Okay, do you want to see? If not, then forget it."

She put her rice bowl on the table, leaning back on the sofa, as if she was ready for me to violate her.

My sister's newly developed, perky breasts looked so mysterious under her white uniform shirt. A woman's secret was about to be revealed to me, and I couldn't help but get excited. I moved closer to her, and that sweet fragrance filled my nostrils. Just as I was about to unbutton her uniform to peek inside...

"Ah, wait a minute." "

What's wrong?"

"Has she changed her mind?"

"Should we take a shower first before we look at each other? I'm all sweaty today."

"No need, I prefer you when you're in school."

"Brother, you really are a pervert."

My sister laughed mischievously. I continued unbuttoning my sister's uniform. Her protruding breasts were covered by a small bra. In her bony waist, I saw the perfectly curved indentation of her navel. So I put my index finger into her navel and rotated it. My sister suddenly groaned.
"It's itchy! Don't touch my navel!"

"If you can't stand this, what will you do later?

" "Anything else is fine, just don't touch my navel!"

"Okay, okay."

I had no choice but to move my hand upwards, towards her breasts through the bra. Her breasts weren't as flat as they were in elementary school, but they weren't yet full breasts; they were more like mounds still growing. In the center of these mounds was a round, protruding part—that must be her nipple. I rubbed my finger against it, and my sister groaned again.

I embraced my sister, my tongue tracing the contours of her fair neck, tasting salty, a faint fragrance emanating from her body. I occasionally nibbled on her ear, eliciting soft moans that only fueled my desire. My right hand kneaded her breasts, feeling her rapid heartbeat.

As time passed, I slowly licked downwards, sucking on her beautiful collarbone, pulling up her bra to reveal her firm breasts. Upon closer inspection, I saw her nipples were red and swollen. I gently rubbed them with my teeth, causing her entire body to tremble.

I began to lick with the tip of my tongue, still finding it salty, perhaps because she had sweated a lot that day. Finally, I sucked the entire nipple into my mouth, my tongue circling the areola. I glanced up at my sister; her eyes were half-closed, her breathing rapid.

I continued licking downwards, avoiding her navel to avoid another scolding. Finally, I reached the area concealed by her pleated skirt. Her black pleated skirt was slightly lifted, revealing her fair thighs. My hand touched my sister's legs, feeling how delicate they were. I wanted to lift her skirt completely, but her buttocks seemed to be holding it down.

"Sister, can you get up for a moment?" "You're sitting on your skirt."

"Speaking of which, why is it only the older brother touching me? I want to see a boy's body too."

"Ah, right. I'm so sorry.

I think I went a little too far just now." So I sat down next to my sister, unzipped my uniform shorts, and my penis sprang out, standing erect through my boxer shorts.

My sister kept stroking my penis through my boxer shorts with her fingers, as if trying to feel its shape. My bulging testicles were held in my sister's palm, while her other hand rubbed my penis. Waves of stimulation spread from the glans, and my mind seemed to go blank.

Then, my sister pulled down my boxer shorts, revealing my penis in its entirety. Under her gaze, it became incredibly hard, and she curiously examined it, just like before.

"It really has pubic hair now! My penis seems a bit darker than before, and it's gotten so big."

"Don't look at it so closely. It's embarrassing." "

What are you shy about? When did you become so timid?"

My sister giggled at me. I was surprised that she laughed at me, and I felt really bad. I pushed her down onto the sofa, sucking on her ear and pinching her nipples with my fingers.

"Ah...okay, okay, I'm sorry!"

my sister moaned, begging for mercy, but I didn't let her go. I kissed her mouth, silencing her, and swirled my tongue inside her mouth. My hands continued to knead her breasts. My sister seemed to give up struggling, letting me play with her body.

My sister's tongue was soft, and her saliva kept flowing in. My saliva also flowed into her mouth. I sucked some back, absorbing a mixture of our saliva, but my tongue was too busy to swallow, and it all ended up dribbling from the corners of her mouth.

Then my sister began to respond to my tongue, and our tongues began to intertwine. I abandoned my sister's breasts, grabbed her shoulders, and kissed her earnestly. My sister's tongue entered my mouth, and I felt her little tongue tickling my palate. Our saliva kept flowing, and I deeply inhaled both my saliva and her tongue. Finally, my sister seemed unable to continue and pushed me away.

"Brother, let me rest for a bit." Mmm…

I continued to kiss my sister's mouth, but she didn't resist, letting me continue to play with her. My bent knees pulled forward between my sister's legs, touching her genitals through her skirt.
I licked my sister's lips, and she closed her eyes, seemingly enjoying my violation. After a long while, I straightened up, the strands of saliva connecting my sister and me, as the final chapter of my punishment for her.

"Brother, really! Just a few words and you've already stolen my first kiss!"

My sister licked her lips, wiping away the saliva I had left on them. Her playful and adorable appearance was gradually making me fall for her.

"Hey! Sister, can we switch rooms?

" "My room… okay."

I pulled up my pants and followed my sister into her room. Her room was filled with a faint fragrance; some photos and childhood toys sat on the bedside table, giving it a distinctly feminine feel. My sister was still in the disheveled state of being violated by me, kneeling on the bed.

She loosened her ponytail, her hair cascading over her shoulders, making her look absolutely beautiful, with a touch of mature allure. She tidied her bangs, removed her school uniform top and tank top, leaving only her pleated skirt, which I hadn't yet conquered, and her panties, guarding her virginity, awaiting violation.

Her bare upper body was incredibly beautiful; her slightly raised breasts followed the curves of her body, down her slender abdomen to her shapely buttocks—the entire silhouette could only be described as perfect. Her skin looked smooth and fair, with two rosy nipples hanging from her white mounds; anyone who saw them would want to suckle them. But my sister pressed her fingers against my lips, preventing me from having the urge to suckle.

"Brother, I haven't touched your body enough yet, shouldn't it be my turn?"

I had no choice but to take off my pants and boxer shorts, and my erect penis sprang out again, the foreskin retracted, revealing a bright red glans, from which a drop of clear fluid had already flowed. My sister licked the fluid into her mouth, and instantly, a stimulating sensation surged through my head.

"I never thought male semen would be so sour..."

My sister closed her eyes tightly, her mouth pursed, and her adorable expression made my heart flutter. She gripped my penis tightly with one hand, an intense tingling sensation reverberating in the spongy tissue, while her other hand rubbed my rough pubic hair, her palm gradually sliding down the pubic hair, her round scrotum held in her palm. My sister began to stroke my penis up and down, waves of tingling sensations coursing through my body.

Then, my sister took my penis into her moist mouth with her tender, luscious lips, her soft tongue constantly swirling around.

"Oh..."

The sudden action startled me. My sister continued to take it in, enveloping the entire penis in her mouth. Suddenly, her tongue spasmed, and she coughed up what looked like discomfort, spraying a large amount of saliva onto my penis, coating it completely. Then she changed her approach, licking the glans with her small tongue, and I felt a wave of pleasure wash over me.

Next, she began to move her mouth up and down, her teeth grinding against the foreskin, her tongue tightly gripping and undulating my penis. It felt so good! Where did she learn all these techniques? "

Is it good, brother?

" "Hmm, who did you learn all this from?"

"Brother, you dare ask me? When did you become so good at violating me?" "

Uh… probably from my classmates."

"Your classmates are teaching you how to seduce your sister, huh?

" "Hey! Wait a minute! You were the one who seduced me in the first place, weren't you?

" "Okay, okay, it seems we've both changed." My

sister giggled playfully, her hand continuing to stroke my penis. I lifted her skirt, my fingers rubbing her vulva through her panties, which were already wet. Above her vaginal opening was an erect clitoris; I gently pinched it, and she trembled suddenly. She gripped my uniform tightly, leaning against me and panting softly.

I supported her body and began licking her soft breasts, the tip of my tongue feeling like a water balloon. Then I took her nipple into my mouth, her entire weight resting on me. Her breaths in my ear created a strange, stimulating sensation.

My fingers danced between her lips, the soft touch of her vulva gently enveloping my fingers. I felt her labia trembling. I pressed in slightly, and she suddenly cried out, her legs straightening, her panties soaked—she had reached orgasm.

My younger sister, her eyes still blurry, leaned on my shoulder, panting. A few seconds later, she snapped out of it, realizing her underwear was completely wet, and blushed deeply.

"I...I wet my pants again."

"That's not wetting your pants, that's called squirting. Only some girls experience that, you're really lucky." "

I really am lucky to have seen my sister squirt twice in a row. It's a pity I didn't understand when I was little." But my sister seemed to still think she had wet her pants; her shy expression was truly endearing.

When my sister climaxed, her hand stopped stroking. But after my sister's series of stimulations and teasing, I felt my desire was urgent and I needed to find a place to release it. Of course, my sister had already prepared the place for me.

I helped my sister down on the bed, and she, still shy and blank, was startled. I unbuttoned her skirt, revealing my naked sister in only white lace panties and socks. The wet panties covered her labia, vaguely revealing her shape. I spread my sister's legs apart, gazing at the hazy outline of her genitals. My finger inadvertently poked her labia, which were still covered in her panties. My sister comfortably pulled her legs back.

"I'm going to take your panties off now."

"Mmm..."

Finally, after five years, I had the chance to see a woman's reproductive structure again. I took off my sister's panties, leaving them hanging on one of her legs. Her vulva was exposed. Surprisingly, her pubic hair was still sparse, with only fine hairs on the sides of her labia, the barely visible slit adding to the mystery. I couldn't help but marvel at how beautiful it was. Unlike when she was in elementary school, she already had a touch of maturity.

I parted my sister's vulva again, the pink flesh gradually peeling away until the cherry-colored membrane in the center, the hymen.

Until now, my sister was still a virgin, but in a moment, her chastity would be broken by me, and she would be completely elevated to womanhood. I inserted my tongue into my sister's virgin territory, licking the depths of her purity. Her vaginal fluid tasted slightly salty and sweet. I gently sucked on it, and my sister let out soft moans. My penis trembled restlessly.

Then, my tongue wandered along the flower path outside her vulva until it was covered with my traces. I told my sister to take my penis into her mouth again, but this time it was just to wet my tube so that it could be easily penetrated into her narrow gate.

"Sister, I'm going to put it in now."

"Okay...okay."

I kissed my penis against her labia. My sister kept her eyes tightly closed, as if she was letting me ravage her at will. I pushed forward, and despite my previous wetness, her gate was still quite tight. So I grabbed my sister's buttocks and pulled her back, while I also thrust in forcefully. At this moment, I felt her vagina loosen inside, and my penis slid in quickly. My sister suddenly convulsed and let out a painful groan. Her vagina

had already gripped my glans. I continued to penetrate, and I felt an obstacle in front of me, which must be the so-called hymen. As soon as I pushed in, my sister trembled in pain. But without overcoming the obstacle in front, I couldn't penetrate her sweet, moist opening. So I pulled back slightly and thrust in forcefully. My sister convulsed violently, letting out a moan, and then her whole body relaxed. I held my sister's slender body, and she lay quietly in my arms, panting.

"Does it hurt a lot?

" "Hmm...let me...rest for a bit."

My sister's hair was spread across the bed, her eyes glistening with tears. I licked her tears with my tongue; her face was so delicate. Her tight opening gripped my penis, opening and closing in rhythm with my heartbeat. Blood flowed from her vagina, a symbol of my sister's ascension to womanhood. I couldn't believe my penis was buried inside my sister's tight opening. This was an experience most people never had. I took out my phone and took a picture of my sister's beautiful body as a memento, then squeezed her slightly protruding breasts. At this moment, my sister seemed to feel better.

"Can we continue?" "

Um, these photos I just took can't be uploaded to the forum."

"Don't worry, they're for my own use."

"My brother is definitely a siscon, a pervert."

My sister playfully teased me, and I began thrusting into her vagina. Her moans replaced her words, and her previously mischievous face turned into one of pain. She clung to my shoulders, her sweet scent filling my breath, her body heat enveloping me. With each thrust, she let out an alluring moan in my ear. I excitedly embraced her, her petite body swaying with each impact.

I lifted her up, letting her sit on me, panting. I admired our union; her full vulva gripped my penis, filled with the blood of her lost virginity, her lips opening and closing as if sucking on my shaft, I could feel her tight embrace inside. My penis hardened, and my sister's mouth trembled slightly, a soft moan escaping her lips.

"Ah…?"

I told my sister to turn around, facing away from me, so we faced the large mirror on the dressing table, our reflections intertwined. My sister leaned forward slightly, and through the mirror I saw her lovely face. Her bangs fell, obscuring one of her eyes, and her hair flowed down her fair neck, reaching her alluring collarbone. Beneath her full breasts lay a slender waist, with a beautiful navel in the center. The curve of her abdomen ended between her legs, where my penis disappeared, as if swallowed whole.

I began to stroke her slender waist, her body soft and smooth. My sister arched back in pleasure, her reflection in the mirror revealing an exquisite curve. The fragrance of her hair filled my nostrils, her vagina tight and slippery, the head of my penis rubbing against it. Each thrust brought a rush of pleasure to my head, but I resisted the urge to ejaculate, wanting to savor her comfort a little longer.

This continued for a short while until my patience reached its limit. I held my sister's body, thrusting faster and faster. Her breathing grew heavier, and suddenly her body stiffened—she must have reached another climax. Then her vagina tightened intensely. In that instant, my desire surged to its peak, and I pushed hard, my glans penetrating to its deepest point, touching her cervix. A sudden, exhilarating release washed over me, and hot semen shot directly into her body.

Once, twice, three times—I ejaculated intensely several times before slightly withdrawing. But her vagina felt so good; I couldn't bear to pull out. I held her still, wiping away the tears from her eyes. Her playfulness was finally subdued. My sister opened her eyes, breathing softly.

"Brother…can you kiss me one more time?"

I turned her back and gently kissed her soft, moist lips.

Of course, the food was cold…

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My promise with my sister

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