Forced penetration of the bound older sister

On June 9th of this year, I finally had sex with my sexy older sister, and from then on, we became a perfect sexual couple. Whenever I had the chance, I would pester her to go to bed with me. Although she still had some fear of incest, she eventually chose my large penis over her morality. After a while, she even came to my bedroom on her own initiative, taking off her clothes one by one, and having wild sex with me. Seeing my sister gradually open up, I was overjoyed, but a secret desire still lingered in my heart: to play SM with my sister. As the days went by, my lewd thoughts grew stronger and stronger. I even fantasized about binding my naked sister with ropes, then wildly dripping wax on her snow-white body and whipping her, watching her round and perky buttocks covered with bloody marks. At these moments, I would hear my sister's lewd moans, my penis would instantly become erect, and my semen would gush out. To satisfy my desires, I secretly bought ropes, low-temperature candles, a vibrating egg, a black SM costume, anal plugs, blindfolds, handcuffs, and other props, patiently waiting for a wild moment. However, I had reservations because my sister couldn't accept such sadomasochistic methods. From my long-term observation, while my sister was sexually promiscuous, she only accepted normal sex, even rejecting oral sex, which was a bit of a flaw. Whenever I clicked on SM pictures on the computer, watching those tortured women being whipped, dripped with wax, having steel needles inserted into their anuses, or having their penises stomped on with high heels, or having urine sprayed into their mouths, my sister always said it was disgusting and asked me to turn it off immediately. I repeatedly told her that SM is actually a high-level sexual method, achieving orgasm in sadomasochistic relationships, which can greatly satisfy possessiveness and a sense of power, but she always thought that such practices that damage the body were too alarmist. However, the more my sister refused, the stronger my desire became; I longed to make her my sex slave as soon as possible. In the agonizing wait, the calendar turned to October 1st, National Day. That evening, my parents went out to play cards with their friends, and my sister dressed up specially, preparing to go out to meet with her colleagues. Although it was a casual gathering, my sister's attire was still exceptionally provocative. She wore a tank top with a beige jacket, her breasts proudly erect between the buttons, revealing a deep cleavage, and the lace trim of her strapless black bra was vaguely visible. She wore a very short skirt, her legs encased in flesh-colored stockings, and seven-centimeter black high heels. Her stockings gleamed alluringly, and as she half-squatted, a corner of her black panties peeked out, right at the entrance to her vulva. I imagined that part of her panties was already soaked with love juice, and I couldn't help but think, "Is my sister going to a sex party? How can she bear to leave me all alone?" I was burning with jealousy, so I moved closer to my sister, stroking her buttocks with both hands, and said, "Sister, don't leave me behind. It's been four or five days since we last made love. Stay home with me tonight. My little brother's been holding back for so long, I'm sure I'll satisfy you." My sister twisted her waist, swayed slightly, and said in a sweet voice, "Stop it, the party's already booked. One of those men has a huge dick, and I'm going to enjoy it... How about this, we'll play together when I get back." I said urgently, "By the time you get back, Mom and Dad will already be home. What chance will I have then, sister?" "Don't be so cruel, little brother wants to make love to you now." He reached his arm under his sister's skirt, caressing her labia through her black panties. "How about this, make love to little brother first, then we can go out." He then boldly pulled her back, his other hand slipping inside her tank top, kneading her left nipple. His sister cried out, "Stop it, stop it, I'm in a hurry! You little pervert, you play with your sister every day, aren't you tired of it?" He grinned lewdly, "Sister, little brother has been with several women lately, but none of them compare to the sexy you. Sister, you're so hot, how could I ever get tired of you? By the way, little brother learned a new trick, let's go to bed and try it." As he spoke, he inserted his fingers into his sister's vagina, slowly stirring them. She let out a soft moan, her body beginning to heat up. His fingers quickly withdrew from her vagina, beginning to tease... I teased her clitoris while licking behind her ear and gently biting her earlobe. Under my guidance, she gradually became aroused, breathing softly and intermittently. Finally, she sighed and said, "Okay, okay, I'll do as you say, but only once. I'm going to a party." I said with a lewd grin, "Sister, you're so unrestrained, even after being penetrated by your brother, you still want to find another man." But secretly, I was delighted: "Once you're hooked, I won't let you go. I'll play with you all night, no matter what." My sister was half-pushed, half-helped into my bedroom, where everything was ready! She suddenly pushed me away, kicked off her high heels, and started taking off her clothes. 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, and pulled down her black panties, revealing half of her snow-white... Her buttocks. Seeing my chance, I smiled and said, "Sister, I bought you a nice piece of equipment. Take a look." With that, I pulled a black lingerie piece from under the large pillow, spread it out, and proudly showed it to her. My sister was startled, then nodded and said, "Good little brother, you really understand my predicament. I've been wanting a sexy lingerie piece, hmm, I'll put it on for you to see." She unhooked her bra, pulled down her panties, and took the lingerie completely naked, slipping it between her legs, adjusting the straps, and changing her position. It was an elastic mesh, open-crotch bra that clung tightly to my sister's full figure, 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 mesmerizing." My sister did as I said, putting on her shoes and striking a pose in front of me, even bending over so I could clearly see... As her vaginal opening slightly parted, she murmured, "What are you waiting for? Just insert it into me like this!" I approached, carried my sister to the large bed, removed her lingerie, spread her legs, and inserted my hard penis into her vagina, thrusting it in forcefully. My sister moaned in response, her hands groping my body. My penis was tightly enveloped; because of the ample foreplay, her vagina quickly contracted, as if trying to suck out my semen. I shook my head to clear my mind, knowing that tonight's encounters wouldn't be limited to just this kind of sex with my sister. So I withdrew my penis, grabbed her hands and pinned them against the bed frame, lowering my head to kiss my sister's nipples. My sister said coquettishly, "Why didn't you put it in? You withdrew halfway? Hurry up and make me feel good! Oh, oh, oh, mmm, mmm, little brother, you're licking me so good!" In her dazed state, she suddenly heard two crisp "click, click" sounds as her penis was already bound by iron handcuffs. Hanging from the iron frame. My sister asked, "Little devil, what are you doing?" I didn't answer, but turned and locked her ankles again, swinging my penis and lewdly grinning, "Sister, you can't escape now, you can only obediently let your little brother play with you." My sister was both angry and amused, and said, "You little pervert, quickly spread your legs. Otherwise, you won't let me penetrate your cunt." I curled my lips and suddenly emphasized, "From now on, you are not my sister, but my sex slave. You must obey your master, or your master will punish you." My sister's pretty face flushed red, as if she had foreseen something, but she couldn't say a word. I urgently took out the rope and began to tie up this beautiful sex slave on the bed who was only wearing stockings and high heels. I loosened the iron shackles, grabbed my sister's hands tightly with one hand, making it impossible for her to move an inch, then tied her jade-like buttocks behind her back and tied a tight knot. Then I put the rope The cord coiled around my sister's body, eventually binding her feet, which were clad in stockings and high heels. I admit I have a fetish for this. When I removed her high heels, I saw her two delicate, pink feet, their snow-white skin revealing faint dark veins. Her ten toes were shyly curled, painted with red nail polish, looking exceptionally sexy and alluring in the 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. Gradually, my sister's breathing became heavy, her cooled desire slowly rising. She mumbled, "Honey, so wet, my feet feel so good, I'm going to get wet!" Hearing this, I was even more delighted, pressing my head between her legs and seeing a stream of love fluid slowly flowing out, dripping into my mouth. Inside, the air reeked of urine and the scent of debauchery. I said suggestively, "Sister, you can still handle sadomasochism, you have the potential to be a slave. If you're not satisfied, you can be the master and torture me!" Of course, I hadn't had enough of the sadomasochistic pleasure, how could I stop there? My sister was now tightly bound, unable to escape my desires. I turned her over so she was facing the sheets. Her body was contorted in agony, but her soft moans never stopped. Her breasts trembled with her breath, and her dark red nipples, pressed against the ropes, were already erect. I happily pulled out the soft whip and gently rubbed it against my sister's buttocks, saying, "Sex slave sister, I'll 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 so much!" I showed no mercy, whipping her again and again.Her buttocks cried out, and with each cracking sound, my sister cried out in pain. Several bright red welts appeared on her tender skin, like a jade pendant smeared with light rouge. I whipped her again, slapping her with my palm. 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, and soon my fingers were covered in her love juice. I put my fingers in my mouth and sucked on them, while continuing to whip my dear sister. I hit her ten more times, and my sister started to sob, her cries interspersed with suffocating moans, her desire growing stronger with each blow. I said fiercely, "Slave, there are still many more props waiting for you! Do you want them?" My sister cried, her nose stinging, and said, "I don't want them, I don't want them! You can forget about ever penetrating me again!" I knew I had to completely tame her! I stopped and laid out the props one by one in front of my sister's exposed vulva. First, I put nipple clamps on her, two small ones covered in soft rubber. The vibrator gripped my sister's back and began working, massaging her sensitive areas. Then, I inserted a 125mm red anal plug, coated with lubricant, into her anus, deliberately shifting the position. Under the vibrator's strongest setting, her nipples tingled and itched unbearably, while her anus was instantly filled, causing a surge of pain and pleasure that made her cry out. I carefully observed her wanton yet pained expression. Streams of love juice flowed onto the bed, and drops of sweat soaked the pillowcase. Just as her labia majora were fully engorged and her opening widened, I turned on the vibrator and inserted it into my sister's vagina. Stimulated by these three BDSM instruments, my sister reached orgasm even faster, writhing on the bed, 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 vibrator, spread my sister's legs, and thrust my penis forcefully into her vagina, hard... He thrust in and out roughly, his hands groping her stockinged legs. The older sister was already wildly aroused; despite her arms being bound behind her back, she sat up, allowing the anal plug to penetrate more thoroughly, her breasts trembling, begging for even more intense humiliation. "I'm so good, little brother, I'm ecstatic! I didn't know SM had such benefits! My breasts are about to burst, but little brother, don't take this clamp off!...Give me more stimulation...give me more stimulation!" I was overjoyed, grabbing my lighter. I lit a low-temperature candle, letting the wax drip all over my sister's large breasts. My sister rolled her eyes back, moaning, "Oh...so good...dripping wax, hot and spicy, I love it!" Red wax dripped down her breasts, down to her waist, and splashed onto her mons pubis. Her long hair was disheveled, the strands glistening with sweat, but her face was filled with desire. As I admired this stunning female slave beneath me, I increased the frequency of my thrusts, and my sister's moans grew louder: "Fuck me, fuck me hard!" "Fuck me! Torture me, torture me mercilessly... Master, play with your slave to death!" I was overjoyed upon hearing this, and made my sister lie face down, dripping wax onto the wounds on her buttocks to increase her pain and pleasure. At the same time, my penis was still stroking inside her vagina, the glans already swollen to its maximum, completely stretching the vaginal walls. Waves of pleasure, waves of shame, the satisfaction my sister brought me made me insane, I lashed out with the whip, lashing her back, tearing at her hair, my sister was like a mare, at my mercy. Riding, I dared not utter a single complaint. I thrust in and out a hundred times, my glans itching uncontrollably. I quickly pulled out my penis and saw my sister ejaculate for the nth time. I hastily shoved my penis into my sister's cherry-like mouth, thrusting my hips, and a large gush of white semen shot deep into her throat. My sister let out a soft moan, followed by the sound of her swallowing the semen, as if savoring a unique delicacy. I grabbed the base of my penis with one hand, masturbating constantly, wanting to ejaculate the last bit of semen into my sister's mouth. When everything stopped… My sister licked the remaining semen off my penis, then knelt before me, her eyes filled with a pleading, hopeless gaze. Two streams of white semen spilled from the corners of her mouth, dripping onto her breasts, which were already red from being bound. In the time that followed, I dominated her in a sadomasochistic act, ejaculating five times. Twice, I even used a plate to collect my semen, making her lick it like a bitch. At this moment, my sister was so submissive, having completely forgotten about the sex party she was supposed to attend; I knew then that my sister was now my sex slave!

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Forced penetration of the bound older sister

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