Forced insertion of the bound older sister (revised version)

Last June 9th, I finally raped my sexy older sister. From then on, whenever I had sexual needs, I would think of her. Whenever I had the chance, I would force her to have sex with me. Although she still hesitated about incest, she finally made a choice between endless pleasure, orgasm, and morality under my coercion. After that, whenever my parents weren't home, I would sneak into her room, tie her up, and make her have sex with me until my parents returned home, then let her go to sleep. After a while, at night, whenever my parents were asleep, she would come to my bedroom on her own, take off her clothes one by one, and I would put tape over her mouth and have sex with her wildly. Seeing my sister gradually loosen up, I was overjoyed, but I still harbored a secret desire in my heart: to play SM with my sister, to make her completely fall into my arms, and to make her my personal sex slave. As the days passed, my lewd thoughts grew stronger. I even fantasized about binding my naked sister with ropes, then frantically dripping wax on her snow-white body, whipping her, and electrocuting her, watching her round, perky buttocks covered in bloody welts. Whenever I did this, I could hear my sister's wanton moans during sex, my penis would instantly erect, and I would ejaculate. To fulfill my desires, I secretly purchased ropes, oral sex balls, electric nipple clamps, a powerful clitoral suction cup vibrator, an electric vibrating egg, a powerful vibrating anal plug, a blindfold, handcuffs, and other tools, eagerly awaiting a night when only my sister and I were at home. However, because my sister couldn't accept such sadomasochistic practices, from my long observation, while she was sexually promiscuous, she only accepted normal sex, even rejecting oral sex, which was a bit of a disappointment. Whenever I click on SM images on the computer, watching those abused women being whipped, dripped with wax, having steel needles pierced into their nipples and then being electrocuted; or having their penises stomped on with high heels and urine sprayed into their mouths, my sister always says it's disgusting and demands I turn it off immediately. I've mentioned to her many times that SM is actually a high-level form of sex, achieving orgasm through abuse, which can greatly satisfy possessiveness and a sense of power, but she always thinks this practice, which is harmful to the body, is too horrifying. However, the more my sister tries to deny it, the stronger my desire to conquer her becomes; I wish I could immediately make her my sex slave. In the agonizing wait, the calendar turned to October 10th, National Day. That evening, my parents went out to play cards with friends, and my sister also dressed up specially, preparing to go out to meet with her colleagues. Although it was just a casual gathering, my sister's outfit was still incredibly provocative. She wore a tank top with a beige cardigan, her breasts proudly erect between the buttons, revealing a deep cleavage, and the lace trim of a strapless black bra was faintly visible through the top. She wore a very short skirt, her legs encased in flesh-colored stockings, and seven-centimeter black high heels. Her stockings gleamed seductively, and when she half-squatted, a corner of her black panties peeked out—the area of her vulva. I imagined that part of her panties was already soaked with arousal fluid, and I couldn't help but feel a pang of resentment. "Sister, are you going to a sex party? How can you bear to leave your little brother alone at home?" I said, burning with jealousy, as I moved closer to my sister, stroking her soft, supple buttocks. "Sister, don't leave me behind. It's been four or five days since we last made love. Just stay home with me tonight. My big cock has been pent up for so long, it'll definitely satisfy you." My sister gently swayed her hips, and I hugged her tightly, swaying back and forth a few times. My sister said with a displeased look, "Stop it. The party was arranged a long time ago. One of the men has a really thick and long cock, and I'm looking forward to enjoying it." "How about this, we'll play together when I get back." I still held onto my sister tightly, saying urgently. "Mom and Dad will be home by the time you get back. What chance will I have to play then?" "Sister, don't be so cruel. I want to make love to you now." As I spoke, I reached my arm under my sister's skirt, caressing her labia through her black panties. "How about this, we can make love first, then we can go out." At the same time, I hugged my sister more boldly from behind, slipping my other hand under her tank top and kneading her left nipple. My sister gasped and said. "Ah...stop it, stop it, I'm in a hurry! You little pervert, you play with your sister every day, don't you want to play anymore?" I said with a lewd grin. "Sister, I've been with a few women lately, but none of them can compare to your sensitive body." "Sister, you're so hot, how could I get tired of you? By the way, I've learned a few new tricks, let's try them out in bed now." As I spoke, I inserted my fingers into my sister's vagina, precisely targeting her sensitive G-spot, causing her to moan softly, her body starting to heat up. My right hand continued to target her G-spot, while my left hand immediately began to tease her clitoris, my fingers rubbing rapidly against her clitoris, while my tongue licked behind her ear, gently biting her earlobe. Under my teasing and enticement, my sister gradually became aroused, breathing softly intermittently, finally sighing and saying, "Okay, okay, I'll do as you say, but only once, okay? I have to go to the party." I said, kissing my sister's face. "Sister is so unrestrained, even after being penetrated by her brother, she still wants to find another man." I secretly rejoiced. "Once you're hooked, I won't let you go. I'll play with you for at least one night." My sister was half-heartedly helped into my bedroom, where everything was ready. She suddenly pushed me away, kicked off her high heels, and began to undress. Soon, my sister, wearing only a black bikini, appeared before me. Just as she was about to take off her stockings, I gestured to stop her. My sister giggled. "What's wrong? Are you going to help me take off my panties?" She turned around, twisting her lower body, pulling down her black panties to reveal half of her snow-white buttocks. Seeing that the time was right, I smiled and said, "Sister, I bought you something nice. Take a look." Saying this, I pulled a black lingerie piece from under the pillow, spread it out, and proudly showed it to her. My sister was startled, then nodded. "Good little brother, you really know what's on your mind. I was just thinking about wanting some sexy lingerie, hmm, I'll put it on for you to see." She unhooked her bra, pulled down her panties, and took the lingerie completely naked. She slipped it on between her legs, adjusted the straps, and changed its position. It was a stretchy mesh open-crotch bra that clung tightly to her voluptuous body, revealing her two large, peach-like breasts and her hairless mons pubis. I admired it, swallowed hard, and said, "Sister, put on some high heels, it'll make you even sexier, absolutely irresistible." My sister did as I said, putting on her shoes and striking a few poses in front of me. She even turned and bent over, and I could clearly see her vaginal opening slightly open. She said softly, "What are you waiting for, little brother? Just fuck me like this." I walked closer, carried my sister to the large bed, took off the sexy lingerie, spread her legs, and inserted my hard penis into her vagina, thrusting it in hard. My sister moaned and groped my body with her hands.

My penis was tightly gripped by my sister's vagina. Thanks to the ample foreplay, her vagina was very wet and quickly contracted, as if trying to suck out my semen. I shook my head to clear my mind, knowing that tonight's activities wouldn't just be about making love with my sister. So I withdrew my penis, grabbed her hands on the bed frame, and lowered my head to kiss and suckle her nipples. My sister said coquettishly, "Why didn't you put it in? You pulled out halfway? Hurry up and do it to me!" I wasn't in a hurry, continuing to caress her nipples with my mouth. "Oh...oh...oh...um...um...um...um, little brother is licking me so good...ah...oh..." In my sister's dazed state, she suddenly heard two crisp "clicks, clicks." Her wrists were already bound by iron handcuffs, suspended on the iron frame. My sister asked. "Little devil, what are you doing?" I didn't answer, turning my head to lock her ankles, waving my penis and grinning lewdly. "Sister, you can't escape now. You'll just have to obediently let your little brother play with you." The sister said, both amused and annoyed. "You little pervert, let go of your sister right now. Otherwise, you won't let me poke your cunt." I pouted and suddenly raised my voice. "From now on, you're not my sister, but my sex slave." "You must obey your master, or your master will punish you." The sister's pretty face flushed red, as if she had a premonition of something, but she couldn't say a word. I couldn't wait to take out the rope and began to tie up the beautiful sex slave on the bed who was only wearing stockings and high heels. I loosened the shackles, grabbed the sister's hands tightly with one hand, making her unable to move, and then tied her jade-like feet, binding them backwards and tying several tight knots. Then I wrapped the rope around the sister's body, finally binding her feet, her feet in stockings and high heels. I confess I have a foot fetish. When I took off her high heels, I saw her two delicate, pink feet, with faint dark veins showing through her snow-white skin. Her ten toes were shyly curled, painted with red nail polish, looking incredibly sexy and alluring through her flesh-colored stockings. I couldn't resist, grabbing her feet and licking them, gently biting her toes with my teeth, and using my tongue to lick from her heels to her toes, enjoying the mixed scent of the stockings and her flesh. Gradually, her breathing became heavy, and her cooled desire slowly rose again. She mumbled, "It's so itchy, so wet, your feet feel so good, I'm going to leak juice." Hearing this, I was even more excited. I put my head between her legs and saw a stream of love juice slowly flowing out, dripping into my mouth, smelling of urine and a seductive scent. I mumbled. "Sister, you can still accept sadomasochism, you have the potential to be a sex slave. If you're not satisfied, you can be the master, you can torture me!" Of course, I haven't had enough of the taste of sadism, how could I stop here? My sister is now firmly bound, unable to escape my grasp. I turned her over so she was facing the sheets. Her body was bent in pain, but her soft moans never stopped. Her breasts trembled with her breath, and her dark red nipples were already erect from being pressed against the rope. I excitedly pulled out the soft whip and gently rubbed it against my sister's buttocks, saying, "Little slut, Master will make you scream with pleasure!" As soon as I finished speaking, a whip lashed across her smooth buttocks. Although the force was not too strong, my sister cried out. "Ah...why are you hitting me...it hurts!" I showed no mercy, lashing her buttocks repeatedly with the whip. The cracking sounds were incessant, and my sister cried out in pain. Several bright red welts appeared on her tender skin, like a jade pendant adorned with a touch of rouge. I whipped her again, slapping her with my palms. My sister's buttocks spread open, her anus tightened, and her labia minora squeezed against her labia majora, revealing a fleshy slit. I kneaded her labia minora with my hands, pushing them up and down. Soon my fingers were covered in her love juice, which I then put in my mouth and sucked, while continuing to whip my dear sister. After dozens more lashes, my sister began to sob softly, her cries interspersed with suffocating moans, which sounded like her desire gradually rising. I said to my sister viciously, "My dear sex slave sister, you're crying already? There are still many toys to play with later." My sister's tears fell even more fiercely, and she said, her nose stinging and her voice choked with emotion. "No... I don't want to. Don't ever let me have sex with you again." I knew I had to completely conquer her tonight, making her willingly my sex slave. I stopped and laid out the tools in front of my sister one by one. First, I put the electric vibrating nipple clamps on her. The two small clamps, covered in soft rubber, bit into her nipples. After the electricity was turned on, the electric shocks and vibrations began to work, massaging her already erect nipples. Next, I inserted a 125mm red anal plug coated with lubricant into my sister's anus, and even rotated it a few times. Under the stimulation of the strongest electric shock and vibration, her nipples felt hot, numb, and itchy, while her anus was instantly filled. The electric shock pain and pleasure immediately surged to her head, and she couldn't help but twist her buttocks and cry out. I carefully observed my sister's wanton and painful appearance. Streams of love fluid flowed from her vagina onto the bed, and drops of sweat soaked the pillowcase. Once her labia majora were fully engorged with blood, I parted them to expose her clitoris, installed the powerful suction cup clitoral vibrator, and turned it on. My sister's slender waist writhed even more violently, and as her wet opening widened, I turned on the vibrating egg and inserted it into her vagina. Under such stimulation, my sister quickly reached orgasm, writhing on the bed and moaning loudly. Her tightly bound limbs curled up like a kitten in heat. Seeing this, I could no longer restrain myself. I pulled out the vaginal vibrator, loosened my sister's legs, and thrust my erect penis into her vagina, pumping hard while groping her stockinged legs. My sister was already driven mad by the stimulation. Although her arms were bound behind her back, she still sat up, allowing the powerfully vibrating anal plug to penetrate her anus more thoroughly. Trembling, her nipples clamped between her breasts, she begged for even more intense humiliation. "Ah... Sister... I can't take it anymore... Stop... Ahhh!" "Sister didn't know SM had these benefits, but little brother, don't take this clamp off!... Give me something more exciting... Give me something more exciting!" I was overjoyed, grabbed the lighter, lit the low-temperature candle, and let the wax drip all over my sister's big breasts. My sister almost rolled her eyes back, moaning. "Oh... so good... dripping wax, hot and spicy, I love it!" The red wax flowed down my sister's breasts, down to her waist, and splashed onto her mons pubis. Her long hair was disheveled, the strands covered in sweat, but her face was full of longing. While admiring the beautiful female slave beneath me, I increased the frequency of my thrusts, and my sister's moans grew louder and louder. "Master, fuck me, fuck this bitch to death, abuse me, torture me... Master, play this bitch to death!" I was overjoyed to hear this, and made my sister lie face down, dripping wax onto the wounds on her buttocks to increase her pain and pleasure.

Meanwhile, my penis was still stroking her vagina, the glans swollen to its maximum, completely pressing against the deepest part of her vaginal walls, the glans constantly pounding against her cervix. I felt waves of pleasure, the satisfaction of humiliating my sister driving me almost mad. I whipped her back, violently tearing at her hair. My sister was like a mare, being ridden at my will, not daring to utter a single complaint. I thrust into her tight vagina hundreds of times, my glans itching unbearably. I immediately pulled out my penis and saw my sister climaxing for the nth time. I hurriedly and roughly shoved my penis into my sister's cherry-like mouth, thrusting my hips forcefully into her throat, a large gush of white semen shooting deep into her throat. My sister let out a soft moan, then I heard her swallow the semen, like she was savoring a special delicacy. I grabbed the base of my penis with one hand and masturbated incessantly, wanting to ejaculate the last bit of semen into my sister's mouth. After it was all over, my sister licked the remaining semen off my penis, knelt before me, her eyes filled with despair and pleading. Two streams of white semen spilled from the corners of her mouth, dripping onto her breasts, already red and throbbing from the nipple clamps. In the following moments, I continued to abuse her forcefully, ejaculating five times. Twice, I even used a plate to collect my semen, forcing her to lick it like a bitch. At this point, my sister was so submissive, having completely forgotten about the sex party she was supposed to attend. I knew that my sister had submitted; she was now my personal sex slave.

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