Passionate Sister (Family Incest Adult Fiction)

(one)

Ever since I had sex with my mom a few weeks ago, I've gradually gotten used to it. Whenever I need it, my mother will try her best to satisfy me, although the frequency is a bit too frequent for someone of my age. However, young people's enthusiasm is unlimited, and my mother is not a woman who can be easily satisfied.

Of course, my interactions with my mom had to be kept secret because we also had to watch out for my sister, Debbie.

My sister is not yet thirteen years old, but she is very precocious and has a well-proportioned figure, especially her hips, which are thin but pointed and perky, which is very attractive to look at. But at first I didn't realize the physical changes in my sister. In my mind, my sister will always be a little girl who will never grow up.

Somehow, my sister seemed to sense that there was something between my mother and I that I was hiding from her. Fortunately, she hasn't really discovered anything yet. Although she is still young and we can't control her even if we want to, it would always be bad if she knew.

My mother and I would have crazy sex whenever we had the chance. There were evidence of our love in the kitchen, bedroom, bathroom and even in the swimming pool. Of course, all this can only happen when my sister is not at home. I like this sneaky feeling because it is more exciting than blatantly displaying lust.

To me, my sister was still just an immature, nosy kid who often ruined my trysts with my mom.

Anyway, I never took my sister to heart. When she was thirteen, she went to junior high school and went to the same school as me, so we had more time to see each other. But there were a lot of guys at school who seemed very interested in my sister. They always surrounded her, guessing her actual age, her hobbies, etc.

Whenever these guys harassed my sister, I would stand up in anger and drive them away without any hesitation. I did this not because I like to protect my sister, but because I think they are so short-sighted that they are so despicable as to attack a young girl.

I am not deliberately playing tricks. In fact, in my eyes, my sister is indeed a girl who is still wet behind the ears. At home, she relies on me and my mother for everything. Without us, she knows almost nothing and can do nothing.

She did, however, feel jealous of the close relationship my mom and I had. For me, who is slow to notice the meaning behind this, it was my mistake.

Two months passed like this. Sometimes I heard some strange noises coming from my sister's room, but I didn't pay any attention to it.

One night, I woke up in the middle of the night and felt a little hungry. Because my sister has been following me like a follower these days, I haven't had much chance to have sex with my mother, so I often wake up in the middle of the night, feeling the emptiness and loneliness of the night. I decided to go to the kitchen to find something to eat to fill my stomach. I thought it was so late at night and everyone else should be asleep, so I didn't put on any clothes and went downstairs naked.

Our house has two floors. My mother and I have our bedrooms upstairs, and my sister's bedroom is downstairs, very close to the bathroom.

I groped my way down the stairs in the dark and walked towards the refrigerator. My sister's room was next to the kitchen.

As I was walking down the hallway, I noticed that my sister's door was ajar and a ray of light was coming through.

Out of curiosity, I stopped and looked inside.

oh! I couldn't believe my eyes!

I saw my sister standing naked in front of the mirror, but it felt so strange to me. The young girl from before is gone, replaced by a young girl who is about to bloom.

My sister now has two lumps on her chest with quite beautiful curves, whereas two years ago there was nothing there. Her butt had obviously begun to develop, with graceful curves already defined and her hips very wide. If she had a little more flesh she would be no different from a mature woman.

Although she still looks very thin and is indeed still a child, there is a clear difference compared to before.

In other words, she has begun to mature.

Her thighs were no longer matchstick-thin but rather round and full. The curve of her back looked very soft, and her spine was very straight, no longer having the ugly protrusion like when she was a child.

I never expected that my sister has grown to this extent without me noticing. She is completely different from the shriveled little girl I remembered in the past.

My sister stood in front of the mirror, staring at herself in the mirror, completely unaware that there was another pair of eyes looking at her in the depths of the mirror.

Through the mirror, I can see my sister's front, from head to toe. The area where there used to be only a belly button is now flat and slightly curved. The chest that used to be as shriveled as a board now had two large mounds of flesh, which were actually adorned with two bright red and cute little strawberries.

What shocked me the most was that my sister's thighs, which used to be hairless, were now covered with fine, curly yellowish pubic hair, with a cute little crack in the middle.

oh! So cute!

In just a short while, my view of my sister did a 180-degree turn, because the sister standing in front of me was already a girl, a lovely, youthful and energetic girl who was in her developmental period, and no longer the skinny and annoying little girl in the past.

She is tall and quite pretty, with a sexy mouth like her mother and a pair of big, bright, clear brown eyes inherited from her father.

All this was enough to make me stunned, but the actions she started to take really gave me a strong impact.

My sister stood in front of the mirror, posing, turning her body left and right, and making various poses, looking at her young naked body in the mirror with a bit of self-pity. Then she closed her eyes like the model in the photo, and roamed her hands across her chest, caressing her small and cute breasts. Her slender fingers pinched her nipples and rubbed them gently. The expression on her face was very intoxicated, and she bit her lower lip with her teeth and let out a low moan. The scene looked a bit like the lonely masturbation performance of a porn star on TV.

Standing outside my sister's door, watching the vivid performance before my eyes, I was stunned and unable to move an inch.

I had never seen such a scene before, and now I was completely attracted by it, and the cock under my crotch stood up unconsciously.

My sister continued to caress her breasts until her nipples became completely hard. Her nipples were not very big and could not be seen clearly from my distance, but I could still easily tell that her two originally red nipples had turned black.

She slowly moved her hands down and began to caress her entire body.

Her hands slid across her flat belly and to her raised buttocks, gently kneading and squeezing her buttocks. She lifted her right leg, and her hands started from the ankle, sliding up along the strong calf, over the knee, across the thigh, and approaching the base of the thigh step by step.

My sister's breathing became heavier, and I gasped along with her.

I stared at my sister's young and beautiful body, and I couldn't believe that she was so well developed at such a young age.

As if to reward herself, my sister sighed and slid her hand between her legs. Through the mirror, I could clearly see her middle finger inserted in the small crack at the base of her thigh, moving it back and forth gently and rhythmically. However, each time the middle finger only entered the crack shallowly for one knuckle and then stopped. It did not go deep into the crack, nor did it stir inside, but it seemed that this had made her very satisfied.

Of course I knew what she was doing, but I didn't expect that secretly watching my sister masturbating would make me so excited. I watched jealously as my sister's slender fingers freely entered and exited that cute little hole, and I wished that my cock, which was already hard and painful, would take its place.

I was excited by my obscene thoughts.

Oh my little sister is fingering herself and her brother is watching!

My sister let go of her breast with her left hand and pressed it against the wall to support her body. She spread her thighs, bent her knees, and slowly slid the middle finger of her right hand into the crack until the whole finger was buried inside.

I couldn't bear it any longer while peeking at the side, so I picked up my cock with one hand and began to rub it vigorously in unison with my sister's movements, imagining that it was not her fingers that entered her narrow, pink hole, but my thick, long cock.

As I watched, my sister knelt down on her knees, supporting her body with her thighs spread, and her fingers quickly moving in and out of her little hole. She looked very intoxicated.

I was watching from outside the door with my eyes burning and my heart beating fast. My cock was erected. I pushed the door open a little more and put my head halfway in. Fortunately, my sister didn't notice at all.

It was a wonderful picture. The sister was caressing her vagina in ecstasy inside the door, while the brother outside the door was rubbing his cock vigorously while peeking at her.

After about two minutes, her thighs began to tremble, apparently because she had been kneeling for too long. I was wondering why she didn't just lie down on the bed, which would have been much more comfortable. My sister seemed to have a telepathic connection with me. In the blink of an eye, she stood up and quickly got on her bed with her finger still inserted in the little hole.

When she lay down, her feet were open facing me, what luck! This time I could see everything clearly between my sister's legs. Her fingers were still going in and out of that cute little hole. Under the light, the roots of her thighs were sparkling. It seemed that my sister had lost a lot of water.

My sister's fingers were moving faster and faster, her thighs were completely stiff and spread wide, her muscles were tense, and her free hand was clenched tightly into a ball, her nails digging deeply into her palm. It seemed that my sister was about to reach orgasm.

Her breathing suddenly became rapid, her thighs and lower abdomen contracted and spasmed violently, and a "ho ho" sound came from her throat. When Mom and I were doing it together, she behaved just like my sister does now, until she climaxed.

I have never heard my sister make such a sexy and suppressed sound before. My sister was obviously afraid that the sound was too loud and would attract the attention of my mother and me, so she covered her mouth with the back of her hand, but the "Yiyi Wuwu" sound still continued.

Her ass was raised high and kept moving upward, and I could see drops of transparent liquid dripping from her little hole.

My sister's body finally fell back on the bed. Her breathing was still rapid, but her tense muscles had begun to relax. Her hands were placed casually on both sides of her body, and she looked exhausted.

From my angle I could see that her nipples and two lovely labia were red, but they were covered with mottled transparent liquid. My sister looked very satisfied and happy. When she turned over and planned to stimulate her body further, her head turned and her eyes happened to glance towards the door.

I stood stupidly at the door, naked, with the big, long, hard cock standing proudly between my legs. Due to the rubbing just now, the glans was extremely engorged and glowing red, and it must have looked very scary.

My sister suddenly shrank to the corner of the bed, her eyes wide open, looking half shy and half scared, her lips tightly pursed.

Soon, she showed a look of disgust.

"Go away!" she hissed, her voice quiet but full of disgust. "Get out of my room, you pervert! Go away!"

Without saying a word, I took a step back and walked out of my sister's room, closed the door, turned around and went back to my room. Of course, I had already forgotten about going to the kitchen to find food.

Back in the bedroom, I turned off the lights and fell on the bed, but I couldn't fall asleep. As soon as I closed my eyes, my mind would reveal my sister's naked body and the way she was posing in front of the mirror just now.

In just over two years, my sister has really changed a lot and is no longer the little girl she used to be. It's not like I've seen her naked before, but I've never had any adverse reaction. I didn't expect that I would be so ugly just now.

Thinking of this, I couldn't help but get excited. It seems that if I have the chance in the future, I must let her take a good look at my cock, and from a very close distance.

The next day, everything was normal, as if nothing had happened.

As usual, my sister and I are going to school after breakfast.

Mom always gets up early to make breakfast for us, even though it delays her work.

In my memory, as long as we had to go to school the next day, my mother rarely stayed in bed. Even if I made her suffer a lot the night before, she would still get up early the next day to take care of everything.

When I went downstairs to the kitchen, my sister hadn't come out yet. Usually she always arrived earlier than me, but today it seemed that I got there first.

"Hi, morning! You look good." Mom greeted me.

"Hi, morning! Mommy looks more beautiful than ever," I said casually, sliding my hand inside Mommy's robe and between her legs.

My fingers easily found my mother's wet and warm labia, oh! It turned out that my mother was not wearing any underwear at all, and my dick suddenly became hard.

If my sister wasn't home, I would be eager to lift up my mother's robe, push her to the sink, and fuck her wet, hot, hairy hole from behind like I usually do.

"Hmm... Hmm..." Mom moaned as I made her fingers move. She kept grinding my fingers with her labia, but she said, "Hmm...! Be careful, baby. Your sister will see it. Where is she? Hasn't she come yet? Normally, she should have come down long ago."

"Don't mind her," I said as I gently worked my fingers along the walls of my mother's vagina. "Maybe she fell headfirst into the toilet and can't get out."

"How can you say that about your sister!" Mom was a little angry and pushed my hand away from her hole.

I deliberately licked my wet middle finger, and then my mother smiled, her eyes eagerly staring at the bulge in my shorts.

She reached out and grabbed my hard cock, and when she was about to take the next step, we heard my sister opening the door.

"Let's talk about it later, baby." Mom whispered to me for a while, then pinched my cock hard before letting go.

When my sister came in, she didn't even look at me. She walked straight to her seat and sat down with her head down. When my mother said good morning to her, she just nodded. I hoped she would look up at me, but she ignored me, as if I didn't exist at all.

"Child, what's wrong with you? Are you feeling unwell?" Mom obviously noticed my sister's abnormality.

My sister just shook her head and glared at me.

Mom noticed something was wrong between us, but apparently thought it was just a normal friction between siblings, so she ignored it and went to make breakfast.

I stared at the way my mother's plump buttocks swayed inside her robe, and cursed my sister in my heart. It was her fault for not coming earlier or later, but just coming in when we were about to do something good.

However, in a flash, I remembered my sister's passionate performance last night, and I couldn't help but look at her differently.

Well, it seems that my sister is a bit slutty like my mother.

If I can play the right cards next time, maybe I will get some unexpected gains, and it will definitely not be as simple as just taking a look at my sister's cute little hole.

Originally, just looking at my mother's ass was enough to excite me. Now, when I think of my sister's lewd performance last night and her vision for the future, my cock becomes even harder.

To hide my embarrassment, I lowered my head and pretended to eat, but my mind was still full of random thoughts.

My sister was sitting next to me, only a few meters away from me, and I could touch her knees with my legs.

Thinking of how naked she was last night, I started to get excited.

I continued to think, what would my sister's lower body look like if I looked under the table? Is she not wearing any underwear, with her vagina's hair not fully grown exposed?

I wondered if I should pretend to drop my napkin and take a peek at it when I bent down to pick it up? But I quickly rejected this idea because I never use napkins. Most of the time I wipe my hands with my shorts. If I suddenly use napkins, people will definitely find it strange.

I looked up at my mom, she was facing the wall, and I thought this was a good opportunity.

My sister had been paying attention to my actions. When she saw me looking at my mother's butt again, she stretched out her leg and kicked me below in anger.

I turned around and gave her a weird smile and continued to eat my breakfast, but my mind was still thinking about how to get under the table and look between her legs.

Oh, it seems that a lot can happen in two years. At least your sister can change to a degree that you can't imagine.

Before, I just thought of her as an annoying, annoying person who I wanted to avoid as much as possible, but now I really am trying to get her attention and want to get her. Although she was still very young, she had a youthful body and was maturing rapidly. The day for picking is not far away!

I was eating carelessly, but my mind was recalling how my sister looked with her thighs spread last night. Her labia were really pink and looked very tender. The hair on both sides had not grown out yet, but it looked even more cuter.

I imagined what color my sister's underwear would be if she wore one, and what kind of clothes she would wear today.

As I was thinking, I looked up at my sister and found that she was also staring at me.

Oh, the way she looks at me is exactly the same as the way I look at her!

My cock unconsciously became erect, and my thoughts somehow turned to my sister's cute pink little hole.

We stared at each other for a long time before I returned to my usual disdainful look at her. At the same time, I saw my mother's mouth move, and then I realized that she was asking me a question.

"Huh? What?" I asked.

"I'm asking you, what's wrong with you two? You two look miserable, are you worried that the sky will fall? I see you're just adding seasoning to the porridge, but you don't eat it. Also, is the milk I made not tasty? Why don't you move? Kids, what's wrong with you two?"

I muttered a few words and quickly ate the ham and eggs that my mother stuffed into my mouth.

My sister also said nothing, just lowered her head and ate her portion.

Mom didn't seem to mind our indifference. She would be happy as long as we ate up the breakfast she made.

After eating, Mom cleared the table and prepared things for us to go to school.

I stared at my mother's trembling buttocks, and really wished I could stop going to school and stay at home to be affectionate with my mother. But every time I thought of my mother's hairy vagina, my sister's little hole with unkempt hair would appear in my mind.

Oh, damn! I can't forget what my sister looked like last night.

Although she looked disgusted by me, I was sure she was just hiding her inner fear, the fear that she was having incestuous thoughts. I'm even sure that she must have been very excited at that time and must have had the same desire as me.

At this moment, a horn sounded outside the door, and my sister and I jumped up at the same time. It was Billy who lived across the street.

Billy and I are good friends. We are the same age, but he already has his own car and he would come and give us a ride to school every day.

My sister and I rushed to the door, but were stuck in the narrow doorway.

"Get out of the way!" my sister shouted.

"No! You're blocking my way."

We pushed each other, trying to get out of the door before the other.

I suddenly did something naughty and slid my hand across my sister's chest.

Oh that's great!

My hand touched my sister's breasts. Although her breasts were small, they were much firmer and more elastic than my mother's.

Just as I was enjoying myself, my sister shrank back and hit me hard on the shoulder.

Mom came over, separated us, and pushed us out the door. She patted our butts gently and told us to stop making noise. My mother obviously saw our little action just now. After pushing us out the door, she stood at the door and pondered for a long time.

It was another boring day, sitting at my desk, the only thing I was thinking about was a woman's vagina. Of course, I was mainly thinking about my mother's vagina. After all, I hadn't touched my mother for several days, and it was exciting to think about it. However, my sister's pink flesh hole kept appearing in my mind from time to time, and I couldn't get rid of it.

Although I had a physical relationship with my mother and I could always enjoy her beautiful and mature body, this did not prevent me from thinking about other women. After all, I was only a sixteen-year-old boy and still very impulsive.

After school, Billy drove over and asked us to get in his car.

His car was already full of other classmates, so after I sat down, there was no place for my sister to sit except on my lap.

I didn't know whether my sister would get on or take another ride, but she climbed on without a second thought and sat on my lap.

As she climbed up I stole a glance at her thighs and answered the question that had been bothering me at breakfast - I had a vague glimpse of her pink panties.

Just like at breakfast, my cock suddenly became hard. When my sister sat on my thighs, my glans was right against her butt.

I have hugged my sister countless times before, and she has sat on my lap more than once or twice. Of course, that was when I was a child, but I never felt anything. Now, I can really feel the pressure from my sister's buttocks and thighs on my glans, which makes me feel like exploding.

As if to embarrass me, my sister's butt swayed from side to side with the bumps of the car, making me feel even more uncomfortable. However, she chatted with other classmates in the car as if nothing had happened, and flirted with Billy from time to time.

My sister's butt moved a little too much, but I pretended not to care and listened to them with interest.

When crossing the street, Billy suddenly turned to avoid the red light, and everyone was caught off guard and leaned to the right. I was sitting on the far left, so naturally I held onto the car body and the others held onto me.

As if by reflex, I put my right hand around my sister's waist.

When the car was balanced, we sat up straight.

My hand accidentally slipped from my sister's waist and fell between her legs, pressing on her slightly raised hillock. Immediately, a soft and warm feeling went straight through the back of my hand.

I moved my hand away as if nothing had happened and placed it on her right leg.

Originally, my sister didn't say a word to me from beginning to end, nor did she say anything about the friction between our skin, but when my hand pressed on her hillock, her body suddenly stiffened, and the muscles in her lower abdomen suddenly contracted and became very tight, but she didn't mean to move away. Her body didn't relax until my hand rested on her right leg.

Afterwards, we continued talking and joking with other people, but it was obvious that neither of us was paying attention to our boring conversation.

I am still thinking about the brief contact just now, and I think my sister must be thinking about the same thing as me.

When we got home, I helped my sister get out of the car, and my right hand naturally reached under her butt and lifted her up.

Of course, I’ve done this move hundreds of times before, but never once did I feel anything like this. I could feel the elasticity of her slightly skinny butt and the softness of the deep groove in the middle.

oh! I can't hold it any longer, my cock is so swollen it hurts.

I got out of the car after my sister and chatted with Billy about the basketball game that was about to start before saying goodbye.

My sister had already entered the room, and I trotted in as well.

Mom is not at home because her sports car is gone.

She always has to work very late and come home very late. After her father eloped with his secretary, he left a bill and her mother has to bear it.

I went to the kitchen to find a sandwich and ate it while wandering around.

When I arrived at my sister's room, I saw that her door was open. This time it was obviously opened on purpose, because I made some clanging noises in the kitchen and my sister would not have failed to hear it.

My sister was sitting on her bed, wearing only bikini panties and a nightgown over them.

Oh, it’s only four o’clock in the afternoon!

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(two)