Having an affair with his wife's younger sister behind his back

My mother-in-law has three daughters, and for some reason, the younger ones are the most beautiful. The eldest daughter is of average appearance and intelligence, while the second daughter (my wife) is above average in looks. My sister-in-law, the third daughter, is exceptionally beautiful. Not only does she resemble the actress Wang Xinping, but her figure is also curvaceous, even surpassing her. What's rare is her intelligence and wit, coupled with a captivating feminine charm. When I first met my sister-in-law, I had only one thought: 'Regret! Regret for not meeting her first, instead of my wife?'
Whenever she affectionately calls me 'Brother-in-law,' strangely, her tone isn't affected, but it often gives me a feeling of intoxication!
Shortly after graduating from nursing school, she passed the general examination and became a nurse at the People's Hospital. But she wasn't content with this; in her spare time, she diligently studied for the nursing college entrance examination. However, because of her outstanding appearance and hot figure, she was often sexually harassed by male patients, who would take liberties with her. Young male doctors also relentlessly pursued her, causing her great distress and making it impossible for her to concentrate on her studies and exam preparation.
With only two months left before the exam, she quit her job, moved out of the hospital dormitory, and stayed at my house to focus on her studies.
It was summer, and my charming sister-in-law usually wore casual t-shirts and shorts. Her fair, slender legs, and the shape of her bra hidden under her t-shirts, often made me fantasize.
Living together often excited me, especially when she forgot to put her clothes away immediately after showering. I felt like I had found a treasure, lovingly smelling the slight lingering odor and urine stains on her underwear, and gently caressing the lace and trim of her bra and panties. Those tiny panties were so different from the underwear my wife wore after giving birth, when her pelvis had enlarged! Because my wife and children were hindering and making it inconvenient for me to rape her, I struggled daily between reason and lust.
One sweltering summer night, my wife turned off the air conditioning in the middle of the night, leaving only the fan blowing hot air, making me toss and turn, unable to sleep. I thought of getting up to get a glass of ice water from the refrigerator in the living room. I quietly opened the bedroom door and went to the refrigerator in the dark. My sister-in-law was wearing a t-shirt on top and only light blue panties on the bottom. In the dim light from the refrigerator, her long, beautiful legs looked incredibly alluring.
Because I was behind her, I looked closer—wow! She wasn't wearing a bra! It must have been too hot; she was also tiptoeing as she drank ice water. I silently watched her beautiful back for a while, my mind only thinking, "I want to fuck her! I want to fuck her!" But because my wife was sleeping in the bedroom, I didn't act on it.
Afraid of startling her, I coughed lightly. She hadn't expected me to get up in the middle of the night, and in a panic, she gulped down water, calling out shyly, "Brother-in-law!" But she drank too quickly and was too nervous, choking and coughing uncontrollably.
Seeing this, I rushed over, patting her back from top to bottom, saying, "Don't rush, drink slowly!"
In my haste, I noticed her t-shirt was partially wet, revealing her full, firm breasts, her pink nipples clearly visible, with beads of sweat glistening on them.
After she caught her breath and stopped coughing, she realized her clothes were disheveled (I was only wearing boxer briefs, and my uncooperative little thing had created a small tent in them), hurriedly thanking me and rushing back to her room, closing the door behind her. I was left staring at the water stains in front of the refrigerator, lost in thought. My
beautiful and charming sister-in-law was staying at my house to prepare for her exams, and I spent my days struggling between visual pleasure, burning passion, and the conflict between reason and lust… More than a month passed in the blink of an eye, filled with surging emotions. Aside from the visual pleasure—because it was summer, she wore light t-shirts paired with short skirts or hot pants, and sometimes when she bent over or looked down, I could often see most of her full, high breasts and cleavage through her slightly loose neckline, and the color and style of her bra—I would deliberately stop and stare at her. On several rare occasions, I saw her chatting excitedly with my wife in the living room,
and from the sofa diagonally opposite, I could see a glimpse of her panties peeking out between her fair, slender legs… When she went out, I would seize any opportunity to sneak into her room, exploring and playing with her sexy undergarments… flipping through her books and documents… hoping to learn more about her private life, and I would fantasize and masturbate in her room many times… All of this was done with utmost care, so she was unaware of the dark side of this refined and handsome brother-in-law.
My wife and I have a very wild and frequent sex life. We are both tall and fit, and in our prime, so we are willing to try all kinds of sexual positions and novel tricks. Every time we make love, I always make her pant, look pained, tremble all over, and moan continuously. Sometimes, late at night, I'm really afraid that her loud moans will disturb others. I think my sister-in-law, who lives in the next room, must hear it too. Even though it's a concrete wall, such loud, passionate moans...
I've also talked about my sexual fantasies with my wife during intense lovemaking. Among them are her beautiful elementary school classmate, actresses Yang Simin, Gong Li, Zhao Wei, TV hosts Wang Xiaoya and Zhou Xun, singer Stefanie Sun, my cousin... When I blurted out, "I want to sleep with my sister-in-law!" she seemed to be stunned for a moment and said, "Really? So you want to sleep with her?" I didn't know how to answer for a moment. Although I was still thrusting into her vagina with shallow and deep strokes, I couldn't help feeling uneasy. After all, my sister-in-law is different from the object of my sexual fantasies who are far away. She's sleeping in the next room right now!
As time went by, my sister-in-law and I grew closer. She was no longer the reserved girl she was when she first moved in. She no longer just chatted with my wife; when she wasn't engrossed in her books, she would talk to me, discussing lighthearted topics, or playing with my three-year-old child…
Many evenings, I would sit in the living room watching the news while my wife cooked dinner in the kitchen. She had just come out of the shower, still steaming, her beautiful face flushed, her long, black hair not completely dry, most of it still damp. She was wearing her usual t-shirt and athletic shorts, revealing her shapely figure, full breasts, slender waist, and beautiful legs.
She sat on the sofa diagonally opposite me, drying her hair with a towel, watching the evening news with me. My gaze, however, drifted from the television to her, wandering and exploring. She seemed completely absorbed, unaware of my lewd brother-in-law's strange gaze, a visual rape of her!
Desire ultimately triumphed over reason! So, following a friend's recommendation, after some minor inconvenience and trouble, I bought what I wanted from a stranger—a date rape drug. Those small, white pills were said to be colorless and odorless, with a strong and rapid effect, and also causing amnesia afterward; they were really hard to find!
Around 11 p.m. that night, I went outside and bought three bowls of delicious stewed pork ribs. My heart pounded with nervousness as I added the powdered drug to the rib soup for my wife and sister-in-law, mixing it all together. I served it to them as a late-night snack, and they happily ate it all without suspicion… Soon after, my sister-in-law went back to her room, saying she wanted to read a little more, and my wife and I soon went back to bed as well.
Around 1 a.m., I heard my wife snoring softly beside me… She rarely snores unless she's very tired. Of course I wasn't asleep. Knowing the medication was working, I anxiously shook my wife's shoulder and patted her cheek, trying several times to wake her, but she remained fast asleep, unresponsive. Reassured, I got out of bed, opened the door, and went to my sister-in-law's room next door (the bathroom). I knocked tentatively…
After a while and receiving no response, I turned the handle and opened the door. The room was still brightly lit, and there was my sexy sister-in-law, fast asleep on the desk, just like my wife. I gently shook her shoulder: "Mengmeng, wake up! Go to bed!" After calling several times and confirming she was sound asleep without any response, I boldly lifted her from the desk and chair and laid her on the bed. My heart was pounding; it felt like it was about to jump out of my chest.
I turned around and locked the door first, then went back to take off my sister-in-law's t-shirt and shorts. As I undressed, my hands involuntarily wandered, eagerly caressing her firm breasts and soft buttocks. Even through her beautiful bra and panties, I felt so excited! Tonight, she belonged to me.
I quickly stripped off my own clothes and went to my sister-in-law's side, carefully pressing my face against hers to admire every inch of her skin. My right hand couldn't resist slipping inside her silky, semi-transparent, pale blue lace panties. Soft pubic hair, soft mons pubis, oh! ... I gently stroked her labia with three fingers, oh! ... Oh! ... Then, using both hands, I first unhooked her bra at the back, lifted her buttocks, and pulled down her panties... Oh! ... Wow! ... Oh! ... So beautiful! Finally, her beautiful body was completely naked, and I couldn't describe the excitement I felt. I was afraid of waking her, so I touched every inch of her flawless white skin. Although I knew she wouldn't wake up so soon, this dream I had longed for day and night had actually come true. Oh! ... Her high breasts had two nipples like grapes, and below them were thick, dark pubic hair. We were now naked together, and my thick penis had been erect at a 45-degree angle for a long time.
I began to squat above her breasts, using my long, thick penis to manipulate and touch her beautiful, sleeping face and lips, as if applying lipstick to her. Oh! ... Slowly, I touched her breasts from top to bottom... her nipples... her belly... her genitals... I pressed my face close to my sister-in-law's genitals, gently parting her labia with my fingers. The thick, dark pubic hair could no longer conceal her plump, slightly pink private parts.
I admired her closely. Her labia were different from my wife's; my wife's labia were a darker red because she had given birth and we made love frequently. ...I stuck out my tongue and began licking my sister-in-law's labia and clitoris. There was a slightly salty smell of urine. My tongue moved back and forth, sucking.
My sister-in-law seemed to let out a soft moan: "Mmm~~" It startled me! She was still fast asleep, probably having a wet dream! I thought. Then I tentatively inserted my fingers into her vagina. It was a little tight, a little warm and moist. I considered whether to break her hymen... I thought, what if there's bleeding? What if she feels pain in her genitals the next day? While thinking, my right hand, with two fingers still about a third of the way into her vagina, kept moving back and forth, stroking and teasing. Gradually, some slightly sticky vaginal fluid secreted from her vagina. Finally, I slowly moved my engorged, erect, and long penis to the edge of my sister-in-law's vulva.
No! I couldn't control myself! Looking at her naked, beautiful body, "Go in!" screamed repeatedly in my burning heart. I jumped off the bed, opened the door, went to the bathroom, grabbed a dry towel, and laid it under my sister-in-law's buttocks. Grabbing my raging penis, I inserted it about a quarter of the way in, thanks to vaginal lubrication. "So what if I die! As long as I can fuck her, it's worth dying for!" I thrust my hips forward. So tight! Harder! It's in! All the way in!
My sister-in-law stirred slightly, her brows furrowed, and she hummed softly, still fast asleep.
I thrust gently yet forcefully, my penis enveloped tightly. Oh! It feels so good! Surprisingly, there was no bleeding, which meant her hymen was already broken; she was probably not a virgin anymore. Whew... thank goodness!
Then I began the real action, my penis thrusting in and out repeatedly, my hands kneading her soft, firm breasts with a little force, occasionally pinching and playing with her nipples. Even in her sleep, her brow was still slightly furrowed, and the pleasure of the thrusting caused her vagina to flow with increasing amounts of vaginal fluid. If she were awake, she would probably be moaning with a mixture of pain and pleasure!
Because my sexy sister-in-law's vagina was really tight, and she was so beautiful and charming, after about 45 minutes of thrusting, I quickly pulled out my penis, and a thick stream of milky white semen spurted out onto her abdomen, near her navel!
Afterwards, I calmly wiped her body, especially her genitals, and even took a few scissors to cut off a few of her pubic hairs and put them in my drawer for future memories. After tidying up the scene for a while, I helped her put on her original clothes, covered her with the blanket, and after checking that everything was arranged correctly, I bent down and kissed her like I would kiss Sleeping Beauty. Then I left the room, went around to the room of my three-year-old child to see his sleeping, innocent face, and finally returned to the master bedroom to sleep with my wife.
The next morning, everyone got up late, not getting up until after ten o'clock to brush their teeth and wash their faces. My sister-in-law, as expected, hadn't noticed that I had raped her the night before, and greeted me with a smile: "Good morning, brother-in-law!" Since drugging and raping my beautiful sister-in-law, her body had been laid bare before me
, and I had thoroughly examined and savored it… but my wife and I were completely unaware! After that, every move my sister-in-law made in my house was completely transparent to me. My gaze seemed to penetrate her clothes; her soft, high, white breasts, the pink nipples with delicate bumps around them, her round, sexy buttocks, her thick, fine, dark pubic hair, her pink, moist, warm vulva, clitoris, vagina… Brother-in-law has secretly and truly ravished you! Mengmeng, I really want to tell you, I'm deeply infatuated with you! But I don't want to rape you secretly anymore; I want to ravish you when you're awake. Yes! At that moment, I began my new plan.
I drove to the city center and bought a small bottle of "aphrodisiac" for 1350 yuan at a sex shop. The owner strongly guaranteed a money-back guarantee if it didn't work!
He even said, "Even a chaste woman can turn into a slut!" Hearing this, I couldn't help but feel excited. The next morning, my wife was taking the kids to visit relatives nearby, but I said I had a headache and didn't want to go, so it was just me and my sister-in
-law at home. She was still diligently studying in her room, preparing for her upcoming nursing college entrance exam. I knew my chance had come. I prepared the aphrodisiac with me and pretended to be bored watching TV in the living room… Soon, my sister-in-law opened the door to go to the bathroom. I already knew some of her habits: how many cups of herbal tea she drank every day, the approximate time she took to shower, the time she went to the bathroom… etc. I knew I only had a few minutes to use, so I quickly and quietly slipped into her room, excitedly poured half of the aphrodisiac into her herbal tea cup, which was about seven-tenths full of tea. It was like heaven was on my side! I gently shook the cup to dissolve it, then quickly and nimbly slipped back to the living room, all without anyone noticing.
Two or three minutes later, my sister-in-law finished using the restroom and returned to her room, closing the door to continue reading. I waited in the living room while watching TV. About an hour later, I got up and knocked on her door. She opened it with a smile and said, "Brother-in-law, is something wrong?"
I said, "Mengmeng, it's nothing. It's just that both sides of my head hurt a little. You're studying nursing, do you know any ways to relieve a headache?"
Mengmeng said with concern, "Oh! Brother-in-law, you might have caught a cold. You should drink more water and get some rest!"
I smiled wryly and said, "I've already drunk a lot of water, but my head still hurts. Sorry to disturb your reading."
My sister-in-law thought for a moment, then smiled and replied, "It's okay! I was just thinking of resting too. Brother-in-law, do you want to see a doctor?" After saying that, she stretched her arms upwards and did a few simple gymnastic exercises to loosen her muscles before picking up her teacup and drinking the herbal tea in one gulp.
I watched her finish the herbal tea in front of me, inwardly excited but outwardly remaining calm, saying, "Just a minor ailment, too lazy to see a doctor."
After hearing this, she pondered for a moment and said, "How about you sit here, brother-in-law, and I'll give you some acupressure on your head, see if that makes you feel better." She pointed to the edge of the bed.
I replied, "Oh! You know acupressure massage? Great! Then… thank you!" I sat down beside her bed, and she knelt behind me, beginning to massage the acupoints on my head with both hands. She clearly knew a bit, and the massage felt very comfortable.
After a few minutes, I felt so comfortable I could hardly sit still and almost lay back. She seemed to notice I wanted to lie down, and her hands, raised high for the massage, were getting a little sore, so she pulled over her pillow to help me lie down. Oh! My head was now pressed against her genitals through the pillow.
After a few more minutes of massage, I, who had been comfortably keeping my eyes closed, couldn't help but steal a glance at my sister-in-law. Her face was flushed, unlike usual. I thought to myself, "The medication must be taking effect!" With that in mind, I deliberately rolled over from my supine position to my prone position. My sister-in-law seemed surprised for a moment, but continued the acupressure massage.
I began to tentatively pretend to change to a more comfortable position, gently stretching my hands around my sister-in-law's kneeling legs and buttocks, lightly touching her legs. At this moment, my sister-in-law asked anxiously, "Brother-in-law, are you feeling better?"
I replied, "Much better, it feels so good! Mengmeng, thank you!"
At this moment, my sister-in-law stopped moving, seemingly trying to stand up. I suddenly grabbed her calves, causing her to lose her balance and fall backward onto the bed. Then I pounced on her, pinning her body beneath me, and we lay down on the bed together.
She cried out in surprise, "Brother-in-law! What...what are you doing..."
I said, "Mengmeng, your brother-in-law likes you. Let me hug you and kiss you. Mengmeng..." As I spoke, I forcefully kissed her, my hands already restlessly pulling down her shorts. She struggled and resisted, "No! No...no!" I ignored her resistance and in a flash, I had pulled her panties down to her knees. My left hand kneaded and pressed down on her breasts, and she still cried out, "Brother-in-law! Don't...do this...don't..." Her hands tightly pressed down on my hands as I pulled down her panties, trying to stop me.
Although she kicked her legs wildly and resisted with all her might, she was no match for my strength. Her panties were pulled down to her ankles, revealing her alluring black private parts. I used my feet to hold her legs together, preventing her from closing them, and forcefully inserted my right finger into her vagina, making repeated thrusting motions.
After a while, I could feel her resistance lessening. I didn't know if it was the drug taking effect or the stimulation from my fingers, but some of her vaginal fluid had started to flow out. She was still crying out, "No... ah... no... um... no... um..." but
her voice was getting softer and softer. Taking advantage of the reduced resistance, I pulled off my shorts and underwear, revealing my erect and swollen penis. By this time, her vaginal fluid had soaked my right palm. Seeing that the situation was hopeless, she gave up resisting and said softly, almost pleadingly, "Um...brother-in-law...um...you...oh...don't ejaculate...inside...I'm afraid...I'll get...um...pregnant...oh...my...head...feels...dizzy...oh...um..."
I soothed her, replying, "Okay! I know, let me love you properly!"
Releasing my rough control, I gently began to remove my sister-in-law's only remaining clothes: a t-shirt and a bra. She shyly turned her head to the side, but slowly cooperated with my movements, her arms bent to cover her breasts. Oh! What a beautiful figure! She later told me her measurements: 36D. 25. 35.
I grasped my thick penis, aimed it at her already overflowing vulva, and inserted it seemingly gently but with a slight force. Oh! This time, inserting it into my sister-in-law's vagina, it was still so tight, warm, and moist, oh! But this time it was even better. My sister-in-law was so real and conscious as I fucked her, her body responding so eagerly.
"Oh!...Oh...Brother-in-law...Oh!...Hmm...Oh..." My sister-in-law's brows furrowed slightly as she moaned softly. I began to thrust repeatedly and forcefully. The warm, moist flesh inside her vagina tightly enveloped my penis. Oh! So good!...Oh! No! I'll ejaculate too quickly! I consciously slowed down my thrusting, then pulled my penis out first, paused, and regulated my breathing. My sister-in-law let out a disappointed moan: "Ah..."
My hands were still kneading and playing with her breasts, my fingers swirling around her nipples, but my penis remained suspended outside her vulva, lightly touching and teasing her thick, dark pubic hair, teasing her without penetrating.
At this point, I knew my sister-in-law was completely conquered by me, transformed into a lustful slut. I replied, "Okay! Then I'll put it in again!" I thrust my hips forward, my huge glans and penis penetrating deep into her body, beginning to pump. She moaned softly, a mixture of pleasure and surprise, "Ah!...Oh!...Oh!...Brother-in-law...Oh...Oh!..."
After about fifty minutes of frenzied thrusting, my sister-in-law had probably trembled and climaxed four or five times! My penis and her genitals were soaking wet, and my arms and back bore the scratches of her fingernails from her unbridled pleasure.
I held back, resisting the urge to ejaculate, and changed positions twice more.
"Oh... Mengmeng, I feel so good! Are you comfortable?"
My sister-in-law was already in ecstasy from my fucking, moaning softly, "Mmm... comfortable... oh... oh!..."
I asked again, "Does your brother-in-law feel good?"
She replied, "Mmm... brother-in-law... I... feel... so... good... oh... oh..."
I asked again, "How about letting your brother-in-law fuck you again next time?"
My sister-in-law closed her eyes and hummed softly, not answering. Seeing that she didn't respond, I thrust into her even faster and harder. She cried out, "Ah! It hurts! Brother-in-law... oh!... oh... mmm... oh..." My hands caressed every inch of her fair skin.
I asked again, "How about letting your brother-in-law fuck you again next time?"
She finally answered, "Mmm... okay... but... I can't let my sister know... oh..."
Hearing her say that, my pleasure was nearing its limit, and I thrust even more violently. She trembled, moaning almost hysterically, "Oh...oh...oh...brother-in-law...oh...I...can't...take it...oh..."
I finally pulled my penis out hastily and moved it to my sister-in-law's face. A thick, milky-white stream of semen suddenly spurted out, shooting onto her lips and face. She lay there motionless, seemingly exhausted, her beautiful face mostly covered in my semen. I couldn't help but smile with satisfaction.
A few minutes later, I suddenly remembered that my wife would be home soon, so I tidied up, let my sister-in-law sleep in bed, and watched TV in the living room.
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Having an affair with his wife's younger sister behind his back

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