My Sister-in-Law and I (Short Story) Author: 120679834

It's been quite a while since I started having an affair with my sister-in-law. During this time, I've rekindled our relationship whenever I have the chance. A few days ago, she brought her daughter back to her hometown and they stayed at my house again. The little one is already three years old and quite adorable,
but she almost caused me a disaster once. When my wife isn't home, she sometimes calls me "husband," and the little one is at that age where she loves to imitate. That time, with my wife and mother-in-law both around, she blurted out "husband!" My sister-in-law and I were stunned. My wife and mother-in-law laughed, asking who taught her that. My sister-in-law lied and said she taught her just for fun. I broke out in a cold sweat; it's true what they say, a guilty conscience is a guilty conscience.
One day, I was home resting, and my wife was working the night shift, so it was just me, my sister-in-law, and their daughter at home. Seeing my chance, as soon as my wife left, I ran to my sister-in-law, put my arm around her waist, and groped her breasts, saying,
"Hey sis, let's do something tonight. It's rare that it's just the two of us since your sister isn't here." My sister-in-law hadn't done anything with me since she came all this time. She looked at her daughter and said, "No, my daughter's here, and my period's coming soon." I was so eager, I wasn't going to give up easily, so I continued,
"Your period's coming soon, but it hasn't started yet. You can wait until your daughter's asleep." My sister-in-law seemed a little hesitant and tempted, but then she threw out a line: "If you want to do *that*, I'll give you a riddle. If you can answer it in 10 minutes, I'll agree." I was stunned! How did it suddenly turn into a paid service? After my attempts to bargain failed, I had no choice but to agree to the terms.
So my sister-in-law gave me the riddle: "A virgin her whole life, guess a name. Brother-in-law, the timer's starting!" Ugh, this seems familiar, but I can't remember where I've seen it before. Three minutes passed and I still had no clue. My sister-in-law smiled and said, "Brother-in-law, how's it going? You have seven minutes left."
A thought suddenly struck me, and I finally had an idea. So I said I'd think about it, went into my room, quickly grabbed my phone, and used UC to access Baidu Knows. There's a saying: "At home, rely on your parents; when you're out, rely on Baidu." That's so true; in today's society, you have to be fast when looking for information. Two minutes later, I found the answer. I thought, "This is how riddles are solved,
" so I went out and said, "Sister, I know!" My sister-in-law looked at me expectantly with a smile and said, "Brother-in-law, tell me the answer." I replied, "Picasso. Sister, you're getting more and more lewd..." My sister-in-law had nothing to say then and had to agree to let me have my way after her daughter fell asleep that night, haha.
The tragedy was, my niece was quite uncooperative at this point. Even at ten o'clock at night, she was still full of energy and showed no signs of wanting to sleep. I was so anxious! Luckily, my sister-in-law thought that children who don't go to bed early are bad for their intellectual development, so she dragged her into bed and forced her to sleep. Seeing that the time was almost right, I quickly ran to take a shower and do some personal hygiene.
After a hurried shower, I found that my sister-in-law had almost soothed her daughter, patting her gently to comfort her. I seized the opportunity to jump onto the bed and hugged my
sister-in-law from behind, beginning to enjoy the mature woman's body in my arms. Reaching inside her clothes, I groped upwards from her waist, discovering she had removed her bra. I slowly climbed to her breasts, enjoying their soft yet firm flesh. While she was comforting her daughter, I began to caress her. I gently rubbed her nipples with one hand, while the other hand explored her waist and hips from below, lightly nibbling her earlobe from behind.
My sister-in-law began to react; I could clearly feel her nipples slowly swelling. So I cupped her entire breast and began to knead it vigorously. When passion begins, vigorously kneading her breasts is something I particularly enjoy doing. I pulled up her top, exposing her beautiful breasts to the air. My sister-in-law's breathing gradually became rapid. She released her daughter, wrapped one hand around my head, and began to kiss me back. I reciprocated by kissing her alluring red lips, my tongue exploring her mouth to savor the sweet saliva.
After a long kiss, my sister-in-law whispered, "Brother-in-law, let's go to your room. It's not convenient with my daughter here." I thought for a moment, chuckled, and said, "No, let's do it here. Let my niece see how I'm messing with her mother." My sister-in-law rolled her eyes at me but surprisingly didn't object. She simply turned around and continued our passionate kiss
. So I flipped her over and began to take control, launching my all-out attack. My sister-in-law's back was quite sensitive; if I touched it well, she would quickly become aroused. I held her body and began to tease her smooth, silky skin. My sister-in-law also began to retaliate, taking off my bra, sucking on my nipple, and gently biting it. It felt good, but I was a little ticklish, so I endured and continued my assault, slipping my hand inside my sister-in-law's panties. They
were only slightly wet. My sister-in-law is indeed a seasoned veteran; she wasn't so easily aroused. This makes me question the realism of those mature women described in books who get wet at the slightest touch. With so much experience, one should have developed immunity. To orgasm so quickly requires a truly special constitution.
At this moment, my sister-in-law slipped her hand inside my underwear, grasped my penis, and began to stroke it. I felt a surge of pleasure. Her small hand parted my foreskin and began to play with my glans.
Since my sister-in-law had started to take advantage of me, I didn't hold back. I quickly pulled off her thermal underwear and panties, and went straight for the sensitive areas. I parted her labia and gently rubbed between her labia majora and minora with my fingernails. My sister-in-law's constitution is rather unusual; what most women find particularly sensitive, her clitoris isn't very large, so I had to proceed slowly and carefully.
After a while, my sister-in-law's genitals began to get wet. I leaned close to her ear and said,
"Sis, lick your brother-in-law." She blushed but nodded slightly. I sat up, and she knelt down in front of me and took my penis in her mouth. While her oral skills weren't exactly professional, they were quite good for an amateur. Under her careful licking, my penis grew thicker and harder. Watching her rub my scrotum while sucking and swallowing, having such a beautiful woman attentively serving me was incredibly pleasurable.
Then she released my penis and continued to stroke it with her hand, looking at me and saying, "Brother-in-law, help me too." So I pressed her down again, spread her thighs, rubbed her vulva a few times, and began to insert my middle finger.
"Oh…" she moaned.
I knew she quite enjoyed having her vagina played with by fingers. Moreover, her most sensitive spot was her G-spot; stimulating it would quickly arouse her.
I first used my middle finger to slowly move in and out of her vagina, occasionally rubbing her G-spot. My sister-in-law started to writhe; she wanted more stimulation. As her vaginal walls softened, I added my ring finger and launched a full-scale attack. I had read many tutorials on squirting,
but unfortunately, I had never succeeded in applying them in practice. So, I ruthlessly rubbed and massaged her rough area, gradually increasing the speed. My sister-in-law immediately became aroused; every woman has her weak spot, haha. The temperature of her vagina and the density of her vaginal fluids increased rapidly. Before long, my sister-in-law grabbed my arm and asked me to stop. Her cheeks flushed, she said,
"Brother-in-law, I want it, give it to me." She had finally gotten into the mood.
I glanced at my sleeping niece beside me, grasped my already throbbing and hot penis, and aimed it at my sister-in-law's opening. I thrust it in forcefully. My sister-in-law let out a soft "ooh" and wrapped her arms around my waist. At this point, I thought for a moment and still asked, "Should we use a condom?"
Actually, I was extremely reluctant, but for safety's sake, I had to ask. After all, if our relationship were exposed, it wouldn't be a small matter. Besides, there was precedent; my wife and I had sex once, and I even used withdrawal, but she still got pregnant. So, not using a condom isn't safe, guys.
My sister-in-law said, "No need." Under my questioning gaze, she said, "My husband has a high sex drive, and we've spent all our money on condoms. I recently got an IUD." Hearing this, my heart leaped with joy. My penis inside my sister-in-law...
It swelled up a bit more. In my mind, only unprotected sex with ejaculation inside is real sex; I'm a believer in internal ejaculation. This situation means that I can ejaculate directly inside my sister-in-law during sex from now on—awesome! Brother-in-law, I love you!
But out of concern, I had to ask, "Don't you want children anymore? You can still have one." My sister-in-law looked at me suspiciously and said, "You're so stupid. You can get rid of the baby when you want it. I'm not sterilized." Yeah, I was so happy, I was stunned.
I started thrusting in and out of my sister-in-law's warm, wet vagina. My sister-in-law's vagina was as comfortable as ever. While I was working on her, I played with her breasts and whispered seductive words in her ear.
"Little sister, your brother-in-law is here to suck your blood." With that, I started biting into her carotid artery. My sister-in-law's moans grew louder. I nibbled lightly and forcefully at her snow-white, sexy neck, sometimes even leaving
faint teeth marks. Excitedly, she wrapped her legs around my waist. I shifted my thrusts downwards. But honestly, I didn't dare bite too hard. First, it was a relatively dangerous area; passion shouldn't be risked with one's life. Second, if I left obvious teeth marks, my wife would see them, and that would be terrible
. Unconsciously, our movements became more and more frequent. I suddenly realized that my niece had woken up sometime during the night. She was looking at me and her mother's intertwined bodies with her innocent, big eyes. Instinctively, I slowed down. And I said to my sister-in-law, "Your daughter's awake." My niece looked at me and called out, "Uncle-in-law (that's the local dialect)." I could only look at her, then at my sister-in-law, asking her with my eyes what to do.
Unexpectedly, women experiencing pleasure are even more frenzied than men; my sister-in-law actually covered my mouth with hers and continued to writhe.
I thought, "Wow, this feels so good! Having sex with you in front of your daughter, it's like something out of a Japanese movie." So I intensified my efforts. But because her daughter was watching, my sister-in-law barely managed to moan anymore, which was a shame. Why not let your daughter hear it?
Sex education should start from a young age. I was shameless… Perhaps it was the particularly stimulating environment, but I quickly became aroused too, and I began thrusting into my sister-in-law's body at full speed. The "slap slap" of flesh colliding followed, and my sister-in-law finally couldn't help but let out a soft moan. Looking into my niece's innocent eyes and my sister-in-law's face contorted slightly as she approached climax, I finally thrust my penis deep into her vagina, ejaculating thick semen that stained my sister-in-law's wanton womb.
Perhaps we were too forceful at the end, because at that moment, my niece opened her mouth and burst into tears. We both panicked a little, forgetting the exhaustion after our climax, and I quickly picked up my niece and handed her to her mother. My sister-in-law then began to comfort her.
At that moment, I thought to myself, my niece is quite considerate; if she had cried right before her climax, I think I would have cried too… After a while, my niece finally fell asleep again. I felt too embarrassed to ask for a second round, so I gestured to my sister-in-law that I should go back to sleep, kissed both mother and daughter, turned off the light, and left the room.
Another time, I had just arrived home when I found the door ajar. My heart skipped a beat; had a thief broken in? I rushed inside to check.
I was shocked to hear strange noises coming from my bedroom as soon as I entered. Listening closely, I realized it was the sounds of a man and woman making love. I froze. Had my wife cheated on me? My anger surged, my hands trembled, and I imagined storming in and beating the adulterer.
Then I realized something was wrong. Listening more closely, I realized it wasn't my wife's voice. And then I heard it was my sister-in-law! Damn it! That slut, using our room to seduce other men… Relieved, my heart began to stir. Although I had an affair with my sister-in-law,
I could accept seeing her with another man; in fact, I found it exciting. To put it simply, I had sexual desire, but no possessiveness. I took off my shoes and crept in, trying to figure out how to see what was happening inside. Suddenly, I remembered I might be able to see through the window in the yard. Since our house is on the ground floor with a fairly large yard, and the bedroom window faces the yard, if the curtains weren't fully drawn, someone could see inside. I crept cautiously into my house, the sounds of my sister-in-law and the man's lewd moans reaching my ears.

I finally reached the yard, only to find they had drawn the curtains shut. Damn it! Were they really going to let me hear but not see? It was suffocating! Thankfully, after careful observation, I noticed the window wasn't locked.
I felt a surge of luck and quietly moved the window a crack open, without making a sound. Then I carefully parted the curtains again. The scene inside the room came into view. My sister-in-law and a portly man were entangled in a sexual act.
The man stood by the bed, thrusting violently into her from behind. He was holding one of her thighs, forcing her legs wide open. Her left leg was supporting her balance on the bed, while her right leg was bent forward, her right foot resting on the edge of the bed, almost like a bow stance. Her arms were being pulled by the man,
and her large breasts were swaying incessantly in front of her. She was even wearing a mini pleated skirt around her waist. Damn, I helped her buy that skirt, it cost over two hundred yuan, and she wore it to seduce me before.
Now, seeing her in that sexy little skirt, half her butt exposed, being brutally fucked from behind, made my chest slowly heat up. It's strange, if it were my wife inside, I would have rushed in and fought that man to the death, but now it's my sister-in-law, I don't feel jealous at all, and I secretly hope that the man fucks her harder, the more enjoyable it is for me.
The sounds of flesh slapping against flesh kept coming from inside the room, and I noticed that my sister-in-law's labia majora were already red, swollen, and even a little black. Damn it, she definitely did it more than once. The man's glans was very large, making his whole penis look bigger, and when he thrust into my sister-in-law's vagina,

her labia were pulled inward, wrapping around the base of the man's penis. When he pulled out quickly, her labia minora also turned outwards. Perhaps due to the deterioration of her sex life after her divorce, her vulva was no longer the pinkish color I remembered from the first time I saw it. The outer edges of her labia were slightly darkened and loose, looking a bit wrinkled.
At this moment, the man's thrusting speed noticeably increased. After a series of vigorous pounding, he pressed his penis firmly against her plump buttocks, pouring all his thick semen into her uterus. Then the two of them collapsed onto the bed, breathing heavily. The man lay on his back and said to his sister-in-law, "Zxy, you have to help me clean up, right?" What
did he mean by cleaning up? Unexpectedly, his sister-in-law got up from the bed, knelt between the man's two hairy thighs, and began to use her mouth to clean the semen off his penis.
You're so shameless... Seeing this, I couldn't help but release my already throbbing penis from my pants and start masturbating.
The sister-in-law diligently licked the man's filthy phallus, her slender hands massaging his dark testicles.
The man lay leisurely on the bed, his hands behind his head, watching his sister-in-law serve him.
Unexpectedly, his penis soon became hard again, and the man slowly moved his hips to allow his penis to penetrate deeper into his sister-in-law's mouth. Perhaps feeling it wasn't enough, he stood up again, grabbed his sister-in-law's hair, and began to violently thrust into her mouth like a vagina.
The beautiful sister-in-law thus knelt at the feet of an ugly, fat man, being humiliated like a sex slave. My hand, which was stroking his penis, couldn't help but quicken its pace. At that moment, I regretted not having a camera to capture and preserve this wicked scene.
I couldn't get the G12 out of the bedroom. It was such a shame. I had to put my phone in camera mode and place it by the window, but I don't know if it would turn out well, since the room was a bit dark.
Then, an unexpected thing happened. I heard the front door slam shut, and my sister-in-law and the man jumped in fright. Someone had come in!
For a second, I thought about it and made a decision: I should help my sister-in-law, since I was also having an affair with her.
I quickly rushed through the yard and headed towards the gate. It was my father-in-law, still taking off his shoes. Luckily, I made it in time. I went up to him and called out, "Dad." My father-in-law saw me and said, "LX, you're off today?" "Yes, I just got back a little while ago." "Where's XY? Shouldn't she be with you?" My father-in-law asked about my sister-in-law. I had to lie and say,
"She stayed out too late last night and is still sleeping." My father-in-law obviously didn't suspect anything; if he had looked around, he might have given himself away. After all, my sister-in-law couldn't clean up the mess so quickly, especially with such a big man involved.
My father-in-law took some tools from our house, sat for a while, and then left. I saw him off, and a moment later, the bedroom door opened, and the man, disheveled, came out, gave me a sheepish smile, and quickly slipped out.
I closed the door, thought for a moment, and locked it. Then I slipped into the bedroom and closed the door behind me.
My sister-in-law, now under the covers, looked at me with a blushing smile.
I said helplessly, "Still laughing? See what happens when your dad catches you." My sister-in-law said to me coquettishly, "Brother-in-law, I'm so grateful to you today." I couldn't help but scold her, "You're really bold. Even if you're going to seduce a man, you should go to a hotel. You dare to do it at home? Do you think nobody comes here? Even though you're divorced and single now, if anyone finds out about what you've done, you're finished." My sister-in-law pouted and said,

"Brother-in-law, don't forget you're involved too. And you're still me." I was silent, speechless... My sister-in-law got out of bed, still shirtless, wearing only a mini-skirt. She leaned against me and wrapped her arms around my head, saying, "Brother-in-law, when did you get back today?" I said irritably, "I got back a while ago. I saw you being fucked to death." My sister-in-law looked at me with her big eyes and leaned even closer to me. Then she reached out a hand and sneakily slipped it between my legs. I hadn't ejaculated while masturbating, and I'd even forgotten to close the door.
My sister-in-law barged in and grabbed my manhood. The stimulation from before was still fresh, and now with her grabbing it, I let out a low groan.
She gently started stroking me, saying, "Brother-in-law, it's still a little wet. You masturbated, didn't you?" "I didn't ejaculate. Your dad was just about to come. How are you going to make it up to me?" "Whatever you want me to do, it's up to you." My sister-in-law was seducing me again.
Seeing my sister-in-law being treated like this by a strange man today, I started to get rough too. I forcefully pushed her down onto the bed and spread her legs. Having just finished our passion, her genitals were still somewhat moist. Her labia were slightly drooping and spread apart. Upon closer inspection, the labia, due to prolonged engorgement, had indeed begun to turn from red to black, and the wrinkles were quite noticeable, somewhat like an old person's wrinkles.
"You slut, when did your pussy get so dark!" I swore, slapping my sister-in-law's plump buttocks hard.
"Ah! Brother-in-law, be gentle..." My sister-in-law blushed and begged for mercy.
I'm usually quite gentle, but today I had a fire burning inside me. I spread my sister-in-law's legs wider and thrust my middle finger into her pussy, pumping it in and out.
My sister-in-law cooperated by raising her buttocks, exposing her most private parts to me.
"It's a little sticky inside, is that man's semen?" I asked.
"Yeah, he came three times inside just now," my sister-in-law answered honestly.
Damn! Hearing that, I lost interest in putting my penis in. I felt a little disgusted, like I was using someone else's leftovers. So I pulled my finger back. My sister-in-law asked, "Brother-in-law, you don't want it anymore?" I replied, "Forget it for today. You should go wash up and
repay my favor next time." At that moment, I saw a hint of hurt in my sister-in-law's eyes, which made me hesitate. But I thought better of it. I really didn't want to go into a slippery place and wait for the semen to turn into water. Besides, the psychological aspect was the key.
To comfort my sister-in-law's hurt heart, I gently pulled her into my arms and kissed her cheeks and lips.
My sister-in-law looked at me with those alluring eyes and said, "Brother-in-law, how about I give you oral sex?" I thought about it and agreed. So my sister-in-law pulled my pants down to my knees and took my penis into her mouth.
At this moment, I remembered the scene from earlier and became excited. I said to my sister-in-law, "Can you do it for me like you did for that man earlier?" My sister-in-law hesitated for a moment and nodded.
She knelt in front of me and began to give me oral sex. I became instantly aroused, grabbing my sister-in-law's head with both hands and thrusting my penis into her mouth like a vaginal canal.

Her warm mouth and slippery tongue stimulated my senses, and I couldn't help but speed up, increasing the intensity. I was sure I was almost at her throat. Her face was flushed, clearly in pain, but I couldn't care less. I increased the speed even when she coughed from choking. In a frenzied assault, I held her head tightly and thrust my penis deep into her throat, ejaculating.
She struggled, struggling to breathe, clearly choking badly. I released her, but before pulling out, I told her, "Swallow it, don't spit it out!" Despite the pain, she swallowed the semen. Then she coughed violently. This was the first time my sister-in-law had tasted my semen.
[The End]

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