I accidentally slept with my girlfriend's sister.

That year, I was 25, and my girlfriend was 3 years younger than me. We had been dating for 4 years. In terms of sexual compatibility, she was the most memorable girl I had ever dated. Her body proportions and temperament were impeccable. She had a handsome face and had once been invited to work as a magazine model. However, due to family opposition and her own lack of interest, she didn't pursue the industry.

My girlfriend lived in Tainan City because her family was busy with their business. She lived alone in a three-story detached villa in the suburbs (Yanxing). Since she lived alone, we often made love naked all over the house—in the bathroom, stairwell, walk-in closet, balcony, etc. We did it very casually. Once, I made love on the washing machine while it was spinning. She had multiple orgasms and even peed (I later learned that was squirting).

Another time, it was his grandmother's birthday, and relatives and friends came from all over to celebrate. His sister (3 years older than her and married) also came back with her child. His sister was just as beautiful as my girlfriend, but she was more feminine, with a more spirited look in her eyes. She was the kind of woman that both men and women enjoyed being close to. His brother-in-law couldn't come because he was abroad on business.

His girlfriend's dad had booked several rooms at the Cambridge Hotel in Tainan for relatives and friends. His sister said she hadn't talked to his girlfriend in a long time and wanted to go to her house so the two sisters could have a good chat. So I drove the two sisters and their child back to the suburbs. As soon as we entered the house, we started chatting in the living room. His sister's 3 or 4-year-old child got really excited, running around up and down the stairs, laughing and shouting, and wanting me to play with her.

His sister realized things weren't going well, so she told my girlfriend, "You should rest first. I'll put the child to sleep and then come chat with you." So we went up to the third floor to my girlfriend's room to shower and watch TV. There are two rooms on the second floor, one for his parents and one for his grandmother. On the third floor, there are two rooms: one for my girlfriend and the other for her younger brother, who is serving in the military. So, she lives on the third floor, in the room across from ours.

When we finished showering and were lying in bed watching TV, my hands started to wander. My girlfriend is very sensitive; even a little teasing makes her blush and her heart race. She never refuses when I want to. A gentle touch to her breasts and a few licks make her weak and aroused. Her genitals get wet after just a few strokes, not to mention when I lick her clitoris, which drives her wild.

We know each other's bodies intimately, and every time we make love, it's incredibly intense. We've once made love seven times a day, and three or four times is common. We do oral sex, breast sex, anal sex (we rarely do anal sex; it's not as pleasurable as described in pornographic articles), vibrators, and dildos. We've tried almost every imaginable position, except for exposure, which we're not interested in. She said we're a match made in heaven. Honestly, beneath her delicate appearance, always wearing a long dress, with flowing hair, speaking softly, and a little shy, you would never guess that our sex life is so rich.

Fueled by a little alcohol, I'd been wanting to have a good time with my girlfriend for a while. I knew she was looking forward to it too, but after being tormented by her sister and that adorable nephew for so long, we finally got back to our room and had a shower. What was I waiting for? My penis was already hard and throbbing. My girlfriend playfully held my penis and said, "Let's take your temperature first." She gave my penis a nickname: "Thermometer." Sometimes he would measure the temperature of my mouth, penis, breasts, armpits, and anus... After saying that, he pursed his lips, moistened them with his tongue, opened his mouth, and took my penis into his mouth, swallowing it all the way in. Then he would tighten his mouth and slowly pull his penis out to the tip of the glans, teasing the urethral opening with the tip of his tongue, swallowing it all the way in again, and slowly pulling back to the glans. He would then use his tongue and teeth to circle around the ridge of the glans, repeating this motion repeatedly. This was my favorite move.

We would often discuss our likes and dislikes about sex, so we never tired of it... When I was immersed in endless pleasure, I suddenly remembered that his sister was coming over to chat with his girlfriend, and I didn't want to waste any more time. So I hurriedly took off his pajamas. His girlfriend hesitated for a moment and said: "Don't take them all off..." When my girlfriend was about to come over, I figured it was fine since she was wearing a one-piece blouse and nothing was visible underneath. So I helped her onto the bed and used my mouth to lift the hem of the blouse. I started using my tongue to lick her lower abdomen, gently biting the waistband of her panties with my teeth, slowly pulling them down with my mouth. I

licked wherever I pulled them down. I knew she was about to climax as she let out soft moans. Once the panties were off her ankles, I started licking upwards from there. When I reached her thighs, I gently parted her slender, shapely thighs. As I expected, her private area was already soaked with moisture. I hadn't even touched her genitals yet, and she was already incredibly wet. As my tongue slowly licked towards her vulva, she wriggled her hips expectantly. I deliberately licked from the inside of her thighs towards her groin, intentionally ignoring her genitals. Finally, she couldn't hold back any longer. She grabbed my head and guided it towards the center, lifting her hips and muttering, "You're bad." You're bad... You're bad... I hate it... I hate it...

To give him immediate satisfaction, I extended my nimble tongue and covered his genitals completely, then used the tip of my tongue to sweep forcefully from bottom to top, from his anus, perineum, vaginal opening, to his clitoris. I heard my girlfriend let out a satisfied "Oh~~" and his groan began.

My tongue moved back and forth inside and outside her genitals, sometimes lightly licking, sometimes heavily teasing, until she cried out incessantly. After about ten minutes, my girlfriend's legs began to tremble, her abdomen stiffened, and her chin was arched upwards. I knew she had climaxed. After a shudder, she held my head and guided it upwards. Following her gesture, I got up and went to him, tightly embracing her body. Our tongues swirled in each other's mouths. After stopping, he moved his mouth to my ear and whispered, "Come in~ okay?"

At this point, I couldn't hold back any longer, but I deliberately acted spoiled, saying, "You lead the way..." My girlfriend glanced at me shyly. She knew I loved the way she guided my penis to her vagina with her hand—that wanton movement that excited me. Under her guidance, my glans finally touched her soft, warm vaginal opening. With mutual anticipation, my glans slowly slid into her vagina. That initial sensation was the most wonderful combination. We heard each other's satisfied sighs simultaneously. After delicate and refined foreplay, the second stage of lovemaking was about to begin—a fierce collision to reach the peak of climax… *

Knock! Knock! Knock!*… Huh? My girlfriend and I suddenly opened our eyes wide and looked at each other. In an instant, the earth stopped spinning, and all movement froze… *Knock! Knock! Knock!*… The second light tap on the wooden door was like an old monk's wooden fish, making you suddenly realize something. Before I could react, my girlfriend opened her mouth and responded, "Oh, coming!" He immediately got up, cupped my cheeks with both hands, and kissed me on the lips, saying, "Sweetie, don't be angry!" I could only helplessly kiss him on the forehead and say, "It's okay!!" Sigh... As my girlfriend got up, she reminded me to put on my pants and turned on the TV. I had to admire her composure. In her panic, she couldn't find my underwear, only hers. She quickly stuffed it under the pillow, pulled the blanket over herself, put her hands behind her head, and pretended to be watching TV intently. (Yeah, right... Hehe, you can tell we were just messing around.) As soon as his sister came in, she smiled at us, and I greeted her, saying, "Are you done with your work?" She said, "Yes, the little rascal was too excited. It took me a while to coax him to sleep." Knowing that I didn't have time to put on my underwear, my girlfriend sat down next to me in the middle of the bed, then patted the empty space on the other side of the bed and said, "Sister, you sit here." Her sister didn't hesitate and sat down, propping herself up with a pillow and leaning against the bedside table, half-lying down. So my girlfriend was in the middle, and his sister and I were on either side. The two sisters started chatting, and I watched TV, occasionally exchanging a few words. As it got late, I turned off the TV and said, "I'm going to sleep now, you two keep talking." Then I pulled my boyfriend to my side, wrapped one arm around my girlfriend, closed my eyes, and went to bed. His sister said he was going back to his room too, and I quickly said politely, "It's okay, you two keep talking, I sleep very well and it won't disturb you." My girlfriend also said it was okay. (I started to regret being so polite! Sigh...) He very casually lay down and continued chatting with my girlfriend. How could I possibly sleep? I was so annoyed!

The two sisters kept talking and getting lower and lower until all three of them were lying down. I was in the dark (because I was pretending to be asleep), while they were in the light (as they were chatting). They were all covered by the same big quilt. I was completely naked under the quilt, and my girlfriend was also naked except for her cover-up. Her sister was also lying down wearing only pajamas. As we lay there, my hands started to wander. I gently slipped my hand inside my girlfriend's cover-up, first touching her thighs, then slowly moving upwards inch by inch. She was probably afraid her sister would notice, so she didn't resist and instead pinched me. I ignored her and continued my exploration. When I touched her buttocks, my girlfriend finally couldn't hold back and said, "Stop messing around!" I didn't respond. My girlfriend could only awkwardly say that when she fell asleep, she would hug someone and unconsciously touch them in the middle of the night. Her sister said, "Your brother-in-law does the same." At this point, the two sisters started talking about this topic. Later, her sister said, "Is it because the light is too bright that he can't sleep well?" As I spoke, I got up and switched the ceiling light to a dim one, instantly casting a yellowish hue over the room. This concealed my surging desire… allowing me to explore my girlfriend's body with even greater abandon… her breasts, nipples, buttocks, vulva, clitoris… Under the stimulation of my skillful fingers, her genitals became overflowing with desire. When I slowly pushed my fingers into her vagina, she couldn't help but let out a soft gasp. Meanwhile, her sister was still chattering incessantly about her husband's family…

At this moment, I could no longer suppress my surging desire. The eager contractions and throbbing of my girlfriend's vagina, transmitted through my fingertips, conveyed a message of longing. I guided her body, which was turned to face me, to arch her hips towards me. Using the expectant fluids flowing from her vagina, I slowly pushed the head of my suppressed, silently raging penis into that warm, wet paradise…

At that moment, her sister was still detailing her mother-in-law's purchase of a diamond ring… Because I was lying on my side with my legs together, I could feel my penis becoming exceptionally hard. Afraid of making too much noise and letting her sister notice, I dared not move, leaving my swollen, hard penis stiff and erect inside her vagina. Soon, my girlfriend, ignoring whether her sister would notice anything amiss, began to fidget restlessly, hoping for more pleasure. So, I honestly and slowly began to thrust. My girlfriend also stopped responding to what her sister was saying, replacing it with soft moans and gasps…

Experienced people know that the final stage of sex is the intense, frenzied thrusting and the explosive ejaculation—that's the most exhilarating and pleasurable experience. This kind of restrained, slow thrusting can't satisfy two bodies conquered by lust. After what seemed like an eternity, her sister, whether sensing something amiss or genuinely exhausted, stopped talking. Instead, I heard even, rhythmic breathing.

Peeking through my girlfriend's body, I could see her tightly closed eyes; her eyeballs were still slightly moving beneath her eyelids, and her eyelashes were fluttering involuntarily. I suspected she was pretending to be asleep to avoid embarrassment… But since she had this considerate heart, I didn't want to disappoint her. So, a wicked thought arose in my mind, and I withdrew my penis from my girlfriend's body, turned her over so she was lying flat, spread her legs, and rolled over between them. I gestured for her to grasp my penis and guide it to her vaginal opening (I liked this action). I reinserted the head of my penis into her eagerly awaiting vagina.

This time, I had no more inhibitions. After holding back all night, nothing could stop our determination to make love freely... At first, it was just a slightly faster thrusting, but after 5 or 6 minutes of unrestrained thrusting, the pleasure of ejaculation gradually overwhelmed my reason. I could no longer pretend to be refined. I arched my back and raised my knees to lengthen the thrusting distance and increase the force. Under my all-out assault, my girlfriend could no longer suppress her lustful cries, which changed from low moans to unrestrained shouts of pleasure. At this crucial moment, we seemed to forget that in this December night, how could her sister, who shared a quilt with us, be completely unaware?

Finally, the uncontrollable semen spurted out, and with my full-force thrusting, there was a series of slapping sounds at the point where my genitals met hers... Amidst the sounds of passion, I charged forward like a wild horse, tightly embracing my girlfriend's body. My lower body remained arched, my penis deeply embedded in her vagina. Immersed in her still-erect vagina, I savored the intense contractions after her orgasm, reluctant to withdraw…

I lay on top of her, panting, our bodies pressed together, feeling each other's heightened sensitivity after the passion. Every nerve transmitted messages of pleasure and satisfied rhythms. I don't know how much time passed. In a daze, I rolled over and lay down, still embracing my girlfriend. This laydown, however, opened another chapter in what was to come…

I habitually lay on my right side, so now I was in the middle, my girlfriend on my left, and her sister on my right. After the passion, my girlfriend and I quickly fell asleep. As I mentioned before, I always have a habit of hugging something when I sleep; if someone is around, I hug them; if not, I hug a pillow. After tossing and turning several times in my deep sleep, I vaguely felt the soft, fragrant body I was holding. A strand of her hair tickled my cheek, so I instinctively smoothed it down, kissed her face, and hugged her

tighter before continuing to sleep. The body I was holding, however, kept shifting restlessly. In my half-awake state, my hands began to wander again, exploring her familiar body. Actually, this wasn't driven by sexual desire, just an unconscious, affectionate caress. My hand first covered her breasts, but then touched her bra. Finding it in the way, I reached behind my girlfriend and easily unhooked it (my girlfriend often says I have skillful hands, which I'm quite proud of, haha). The full, round breasts in my hands—that feeling of fullness always intoxicates a man. Actually, in my sleep, I had no intention of going any further. So, holding her breasts, I drifted back to sleep… After what seemed like an eternity, my hand unconsciously touched my girlfriend's private parts again. I couldn't feel anything through her underwear, so I used my fingers to peel back the bottom of her panties and directly probed her genitals, only to find them incredibly wet and slippery. At that moment, I suddenly froze, my fingers stopping too… My girlfriend had been completely naked under her bra just moments before, so how come she was now wearing a bra and panties? Before this, I had kept my eyes closed, feeling uneasy. Feeling guilty, I slightly opened my eyes… Suddenly, a chill ran from my feet to my head…

Oh my god! I was hugging my girlfriend's sister! I instantly snapped awake, but didn't know how to end this. All my movements froze. Ironically, my fingers were still inside her sister's vagina. By the light of the wedding banquet, I glanced at her; her eyes were still tightly closed, even visibly tightly shut. Suddenly, I realized that her sister had an ostrich mentality; with her eyes closed, she could be said to be asleep, and she "didn't know" what was happening. So, if I also kept my eyes closed, it could be said that I had hugged the wrong person in my sleep.

So, just as my guard was down, lust arose again. Since that was the case, I decided to go with the flow and resumed my finger movements. First, I gently stirred the shallow part of her vagina, using the vaginal fluid to smear the clitoris with a gentle, rhythmic massage. Initially, because her legs weren't wide enough and she was still wearing underwear, it was a bit difficult for my fingers. Without hesitation, I withdrew my hand from her clitoris, hooked my fingers around the waistband of her underwear, and pulled it down. Surprisingly, even while her eyes were closed and she was fast asleep, she was able to lift her hips, allowing me to easily remove her underwear. When my mischievous fingers returned to her wet, juicy vulva, I felt a significant increase in "room for maneuver." It turned out her sister had automatically spread her legs wider, making it easier for my hand to move.

After teasing her clitoris for a while, I tried to slowly insert my middle finger deep into her vagina. As I pushed my finger in, she lifted her lower body, eagerly welcoming me. What surprised me even more was the astonishing amount of her vaginal fluid; it had completely soaked my hand. I tried inserting two fingers into her vagina to stir, and unexpectedly discovered a protrusion at the upper edge of her vagina, not very noticeable, but palpable. When I touched this protrusion, she suddenly hugged me tightly, her lower body almost lifting off the bed, arching her back and trembling uncontrollably… making sounds like "oh~ oh~ oh~". I knew she had orgasmed.

I held his sister tightly in my arms and lowered my head to kiss his neck, earlobe, and forehead. We remained like this for a minute or two, then slowly his sister's body relaxed, and the tightness of her grip on me lessened considerably. I sealed his lips with mine, and his sister immediately extended her soft, smooth tongue, swirling it in my mouth. After our reluctant French kiss, I deliberately whispered my girlfriend's name in his ear, "Huihui, was it good?" His sister, still with her eyes closed, nodded gently. I

called her that deliberately to avoid awkwardness. After all this, I was already burning with desire; my hard penis trembled against his stomach. His sister silently reached out and grasped my erect penis in her hand, using the pre-ejaculate secreted from the glans to gently massage the urethral opening with her thumb. I rolled over and pinned her sister beneath me. To my surprise, besides spreading her legs, her hand grasped my glans and guided me to the entrance of her vagina. As my glans entered her vagina, her hand immediately moved to my buttocks and forcefully pulled me towards her. Encouraged and expectant like this, how could I disappoint her? Although lust overwhelmed our reason, I still hesitated because of my girlfriend sleeping beside me. I didn't dare to thrust too vigorously, especially since the object of my affection was her sister, and I couldn't assess the consequences if my girlfriend saw us. Besides, I love my girlfriend, and she cares about me deeply.

In this dilemma, I almost stopped… but her sister's hand on my buttocks grew increasingly urgent; I knew she was about to reach another climax. I couldn't pretend any longer, so I whispered in her ear, "Shall we go outside?" She seemed not to understand at first and paused, then nodded after a moment.

Interestingly, her sister still had her eyes closed. I rolled out of bed, not even dressed, and walked out into the small living room. After a while, I heard rustling sounds, and her sister's figure finally appeared in the darkness. I hugged her sister, and in the dark, without needing to adjust, our mouths quickly became entangled again, greedily sucking each other. After a passionate kiss, her sister gestured for me to sit down, so I sat on the sofa. She knelt down between my legs, first gently holding my penis and stroking it for a while, then brushing her long hair behind her neck (this is the most alluring action a woman can take before giving a man oral sex). Then she lowered her head and lightly licked the urethral opening of my glans with the tip of her tongue, then slowly took the entire glans into her mouth while her tongue continued to swirl around inside. After a while of swallowing and spitting, her sister continued to fondle my scrotum and perineum, and at the same time, I almost couldn't help but groan.

Unable to endure the torment any longer, I stood up, helped her sister up, and laid her on the sofa. I lifted her pajamas, revealing her naked body beneath. I spread her legs wide and eagerly thrust my rock-hard penis into her vagina. As I penetrated, she let out a satisfied moan. Here, we were unrestrained, thrusting wildly and deeply. The sounds of my penis pounding inside her wet vagina, her moans, and my own panting echoed in the dark space…

Perhaps it was the second time we were making love, or perhaps the alcohol had slowed the effects, but I continued thrusting wildly for a long time until I heard her sister repeatedly say, “No more… no more… I can’t take it…” I felt so numb… Finally, I couldn’t suppress my urge to ejaculate either. With a final, deliberate, heavy thrust, I couldn’t hold back any longer. The swelling of my glans made her feel my impending ejaculation. She grabbed my waist and almost shouted, “Ejaculate inside!” I ejaculated inside…

As I ejaculated, I pressed my penis tightly against the deepest part of her sister's vagina, my penis throbbing pleasurably inside. Unexpectedly, the contractions in her vagina were even stronger than with my girlfriend, no less intense than the pleasure of her sucking my glans in rhythm with my ejaculation when I ejaculated in her mouth. After ejaculating, I was practically sprawled on her sister.

After a while, she gently nudged me to get up. As I withdrew my semi-erect penis from her body, she made me sit down again, covering my penis with one hand, and then knelt down, taking my glans into her mouth and gently sucking on it. After a considerable amount of time, to reciprocate her tenderness, disregarding the semen still in her mouth, I passionately kissed her again…

Afterwards, we didn't say a word, just embraced each other until the sky outside the window gradually turned white. Only then did she say, "Let's go to the room and sleep." I kissed her forehead, got up, and went back into the room. I glanced back at her sister; she was still sitting alone on the sofa. When our eyes met, she waved me in, signaling me to come in quickly. When I got back to the room, I saw my girlfriend was still fast asleep. I crawled naked under the covers and pulled my girlfriend into my arms. She hummed softly, opened her sleepy eyes, looked at me, kissed me on the lips, and then closed her eyes again, falling into a deep sleep…

That night, by sheer accident, I ended up sleeping with my beautiful, seductive, and wanton girlfriend's sister… I… felt so good!

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I accidentally slept with my girlfriend's sister.

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