A Submissive Sibling
Copyright© 2025 by H. Malcom Walker
Chapter 6: Monday Afternoon
Incest Sex Story: Chapter 6: Monday Afternoon - Mark and his sister Carrie have always gotten along well, even if she likes to tease him a little too much. A surprising DNA result leads to lines being crossed. Discover the taboo journey of two siblings caught in a web of desire and consequences.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa Consensual Heterosexual Incest Brother Sister FemaleDom Humiliation Anal Sex Masturbation Oral Sex Sex Toys Illustrated
I brushed the dirt and dust off my body as best I could. My mind was still reeling from the intense experiences from moments before. I reached for my clothes, grumbling to myself about my brat sister stealing my underwear. “She’s such a pain in the ass,” I muttered, zipping up my shorts and grabbing my shirt. “Literally.”
I sat down on a nearby rock, taking a moment to contemplate my situation. The cool breeze rustled the leaves above me, a stark contrast to the heat and intensity of what my sister had put me through. I had to face facts. I was under my little sister’s control, and the scary part was that I was enjoying it. When she pushed that vibrator into my asshole, it was the most incredible, intense sexual feeling I’d ever had. The sensations were unlike anything I had imagined, and my body had responded in ways I couldn’t control.
But was I comfortable with it? I wasn’t sure. The conflict raged within me. On one hand, the pleasure was undeniable, and the way Carrie took charge was so arousing. On the other hand, I felt a sense of vulnerability and submission that was new to me. Other than Carrie acting like a brat to get her way, I had always been the one in control in our sibling relationship, the one calling the shots. Now, I was at Carrie’s mercy, and it was both exhilarating and terrifying.
I sighed, running a hand through my hair, trying to make sense of my jumbled thoughts. I had always known Carrie wanted things her way, much like Mom, but I never imagined she would take it this far. She had always manipulated everyone to get her way, not outright demanded it. I also never imagined I would give in to her, but I had, and I had loved every minute of it. That pussy of hers ... damn, it was pure magic. It owned me, body and soul. I’d do anything to get into that tight little slice of heaven.
I stood up, taking one last look at the pile of boulders where my world had been turned upside down. I took a deep breath, steeling myself for the rest of the day. I had classes to attend, and I couldn’t afford to be distracted. Not after what had just happened.
With a final sigh, I left the greenway and headed back to campus, my mind a whirlwind of conflicting emotions. I was under Carrie’s spell, and I wasn’t sure how to feel about it. Whatever came next, at least I knew it would be anything but boring.
I was waiting for Carrie in the car after class when she opened the passenger door and hopped in. “Hello big brother,” she said with her dazzling smile. “Did you think about me all day?”
Before I could answer, she leaned over and grabbed my head to pull me in for a long, deep kiss. Her lips were soft and warm, contrasting with the cool air inside the car. I could taste the faint hint of mint on her breath. It made a refreshing contrast to the earthy, primal scents that still lingered on me from our encounter in the woods. Her tongue explored my mouth, dancing and teasing, taking control of the kiss just as she had taken control of me earlier. I felt a rush of excitement and submission, my heart pounding in my chest as I surrendered to her. The kiss was intense, passionate, and all-consuming, leaving me breathless and wanting more. It was a claim, a reminder of who was in charge, and I found myself eagerly submitting to it.
As I pulled out of the parking lot, Carrie reached into her backpack and pulled out my underwear, a wicked grin spreading across her face. “Looking for these, big brother?” she teased, dangling them out of my reach. I tried to snatch them, but she was too quick, pulling them back and laughing at my attempts. “Not so fast,” she said with a cackle. “I think I’ll keep these for a while longer.”
She brought the underwear up to her nose and inhaled deeply, a satisfied smile playing on her lips. “Mmm, I love your scent,” she murmured, her eyes never looking away. “It’s musky and masculine, and it drives me wild.” She pulled up her skirt, revealing that she now had on a pair of black lace panties. “Do you want to smell my panties, Mark?” she asked, taunting me. “Do you want to be a good boy and smell them for me.”
I hesitated, feeling a mix of embarrassment and arousal. “Yes, ma’am,” I finally managed to say.
Carrie smiled triumphantly and slowly pulled off her panties, the black lace a stark contrast to the smooth, creamy skin of her thighs. She brought them up to my face, and I could smell her arousal, a heady and intoxicating scent that made me wild with lust. “Smell them, Mark,” she commanded. “Smell how wet I am for you.”
I obeyed, inhaling deeply, the scent of her filling my senses and making me dizzy with desire. Carrie continued to talk dirty to me with a low, seductive murmur. “You like that, don’t you, big brother?”, her fingers tracing patterns on my thigh. “You like knowing that I’m wet and horny for you. That I’ve been thinking about you all day, just like you’ve been thinking about me.”
She pulled the panties back and put them down on her thigh, where she began carefully folding them into a neat little triangle, with the crotch side up. She pushed them back towards my face and said, “Open wide.”
I looked at her with wide eyes for a moment, but then opened my mouth. She placed them inside, with the crotch laying directly on my tongue. “Keep them in there, big boy,” she said firmly as she pushed up on my jaw to close my mouth around her pungent underwear. “Be a good boy for me, and maybe, just maybe, I’ll let you taste more of me later.”
With that, she set her phone to give directions to a nearby romance boutique, a mischievous glint in her eye. “I feel like doing some shopping, big brother,” she said, her voice filled with promise. “And I think you’re going to enjoy what I have planned for you.”
We pulled up to a romance boutique, and Carrie turned to me with a wicked smile. “Remember, big brother,” she said. “You keep my panties in your mouth and don’t talk unless I say so. Understood?”
I nodded, feeling a mix of embarrassment and excitement. The taste of her was strong on my tongue, the scent of her arousal filling my senses and making me horny as all fuck. I followed her into the store, my heart pounding in my chest as I tried to hide my bulge.
The boutique was small but well-stocked, with shelves lined with an array of sex toys, lingerie, and other erotic accessories. The air was filled with a faint, pleasant scent, and soft music played in the background, creating an intimate and inviting atmosphere. I felt my face turn red as I looked around, taking in the various items on display.
Carrie took my hand as we walked up to the counter, where a friendly-looking female associate greeted her with a warm smile. “Welcome to Pleasures! How can I help you today?” the associate asked, her eyes sparkling with curiosity.
Carrie leaned in, a conspiratorial glint in her eye. “I’m on the hunt for some new toys,” she said, glancing at me with a secretive smile. “I want to delve into some new ... shall we say, experiences with my lover.”
The associate’s smile widened, and she nodded enthusiastically. “Of course! I’d be happy to help. Do you have anything specific in mind, or would you like me to show you some of our best-sellers?” She led us towards a wall filled with small, shiny cardboard boxes stacked on shelves.
Carrie’s eyes scanned the shelves, and she pointed to a section filled with vibrators. “Let’s start with those,” she said. “I want to hear all about them.”
The associate led us over, and Carrie started to ask a barrage of questions, her voice filled with genuine curiosity and excitement. “What’s the difference between these two models?” she asked, picking up a box that showed a sleek, black vibrator and another that showed a more curvaceous, pink one.
The associate launched into a detailed explanation, describing the features, benefits, and unique selling points of each model. “Well, this black one is a classic bullet vibrator,” she said, holding up the box. “It’s small, discreet, and perfect for targeted stimulation. It has ten different vibration patterns and five speed settings, all controlled by this simple button here. It’s rechargeable and waterproof, making it versatile for use in the shower or bath.”
She then held up the box with the pink, curvaceous vibrator. “This one is designed for both internal and external stimulation. It has a unique shape that’s perfect for hitting those hard-to-reach spots. It vibrates at seven different intensities and has a special ‘come hither’ motion that’s great for g-spot or prostate stimulation. It’s also waterproof and rechargeable, with a remote control for easy use.”
Carrie listened intently, asking follow-up questions and seeking clarification on certain features. She then moved on to other vibrators, picking up several, examining their shapes, sizes, and textures. “I want one that’s made especially to pleasure a man in his ... bottom,” she said, her confidence wavering a bit. “Something that will really hit his pleasure spot and give him an unforgettable experience.”
The associate nodded, understanding her request. “You’ll be wanting to focus on prostate massagers, then. This one, for example, has a unique shape that’s designed to stimulate the prostate,” she said, holding up a vibrator with a distinctive curve. “The Njoy Pure Wand has a 3-inch bulb on one end and a 5.5-inch bulb on the other, so you can choose the size that’s right for you. It’s made of stainless steel, which is great for temperature play and is easy to clean. It doesn’t vibrate, but the curve is perfect for targeting that sweet spot.”
She picked up another vibrator, this one with a more subtle curve. “The B-Vibe Rimming Plug is great for prostate stimulation and offers something extra,” she explained. “It has a motorized base with rotating beads that simulate the sensation of analingus. The vibration and rotation options can be controlled through a button on the plug or with a wireless remote. It’s perfect for those who want a unique and intense experience.”
Carrie took the vibrators from the associate, inspecting them closely, her eyes narrowing as she considered her options. “And what about this one?” she asked, setting those down to pick up a box that showed a vibrator with a more subtle curve and a textured surface. “It looks interesting.”
“This is the Lelo Billy 2,” the associate repeated, noting Carrie’s interest. “It’s a prostate massager with a unique design. The tip is angled to target the prostate, and it has seven vibration functions. It’s made of body-safe silicone and is easy to clean. The controls are located at the base; you’ll find a power button to turn it on and off, a plus and minus button to adjust the intensity, and a mode button to cycle through the different vibration patterns. It’s a great choice for those who want a combination of vibration and pressure.”
The associate then turned to me, a curious look on her face. “Your boyfriend is very quiet. Is everything okay?”
Carrie smirked and turned to the associate, “He’s just a bit shy. Aren’t you, Mark? My little pet gets tongue-tied when he’s around pretty ladies.”
The associate chuckled softly, “Well, I understand that. Some people just need a little time to warm up. And hey, whatever floats your boat, right? No kink-shaming here. We’re all about consent and comfort. Isn’t that right, Mark?” she said, giving me a warm, encouraging smile. “You do you, and don’t be afraid to explore what you’re into. We’re all adults here.”
I nodded at her, my face still flushing with embarrassment. The fabric of the thongs was starting to dry out, becoming more uncomfortable as they lay against my tongue.
Carrie continued to look at the Lelo Billy 2 box, inspecting the picture of the controls at the base carefully. “I think this one will do fine,” she said, a wicked smile playing on her lips. “Do you have any color options?”
The associate nodded. “We have it in Deep Blue or Black. Which would you prefer?”
Carrie didn’t hesitate. “Black. It’s more discreet I think.”
With the chose vibrator in hand, Carrie turned to the associate with a sly smile. “I also want some kind of ... oh, I don’t know... ‘starter’ butt plug I can use on my lover to help him get used to anal a little faster,” she said, her voice taking on a wicked tone. “Something that’s comfortable and easy to insert. And is there a plug he can wear all day and still be comfortable?”
The associate nodded enthusiastically, leading us to a section dedicated to butt plugs. She showed Carrie a variety of options, explaining the differences in size, shape, and material with great detail.
“This one, for example,” she said, holding up a small, discreet butt plug, “is made of soft, body-safe silicone. It has a comfortable, tapered design with a flared base to prevent it from going in too far. The tapered shape makes insertion easy and comfortable, even for beginners. It’s perfect for those who are new to anal play or for anyone looking for a discreet, everyday wearable. The silicone is soft enough to be comfortable but firm enough to provide a satisfying feel. It’s also easy to clean and can be worn for extended periods without discomfort.”
Carrie examined the plug, turning it over in her hands, her eyes sparkling with mischief. “That sounds perfect,” she said, sounding like she was filled with anticipation. “I think my lover will enjoy this very much. Won’t you, baby?”
I nodded reluctantly, my eyes wide with a mix of arousal and nervousness. The thought of Carrie using that plug on me sent a shiver of anticipation down my spine and straight through the shaft of my already hard cock. Without underwear to help hold it down, the bulge in my shorts had to be enormous.
The associate, seeing our interest, continued her explanation. “Now, this one is a bit different,” she said, picking up a larger butt plug with a more pronounced shape. “This is made of high-quality, medical-grade stainless steel. The steel provides a firm, unyielding feel that some people prefer. It’s also great for temperature play—you can warm it up in hot water or cool it down in the freezer for a unique sensation. Of course it features the flared base. This one is better suited for those with some experience and who are looking for a more intense sensation.”
She then picked up another plug, this one with a unique, twisted shape. “This twisted plug is designed to provide internal stimulation as it moves. The twisting motion can hit different spots inside, providing a variety of sensations. It’s made of body-safe silicone, so it’s comfortable and easy to clean. This one is great for those who want something a bit more adventurous and stimulating.”
Carrie handled each plug with confidence, examining them closely and asking detailed questions about their features and benefits. “And what about this one?” she asked, picking up a plug with a ribbed design. “It looks interesting.”
“This ribbed plug is designed to provide extra stimulation with its textured surface,” the associate explained. “The ribs run along the length of the plug, providing additional pleasure as it moves in and out. It’s made of body-safe silicone, so it’s comfortable and easy to clean. Flared safety base and the tapered design makes insertion easy. This one is perfect for those who want to enhance their pleasure with some extra texture and stimulation.”
Carrie’s eyes lit up as she considered the options, her mind clearly racing with the possibilities. “I think we’ll start with the smaller silicone one for now,” she said, a wicked smile playing on her lips. “But I’ll keep the others in mind for future adventures.”
The associate nodded, helping Carrie wrap the chosen plug carefully. “Just a tip,” she added, leaning in conspiratorially, “if you want Mr. tall and quiet to wear it all day, don’t use too much lube. You want enough to make insertion comfortable, but not so much that it slips out easily. That extra little bit of friction will help keep it in place. Trust me, I’ve had customers come back and tell me that was a game-changer for them for daily wear.”
The associate packaged up Carrie’s purchases, and as she handed her the bag, she winked at me, a knowing smile on her lips. “Have fun, you two. I’m sure he will,” she said with a smirk in my direction.
Carrie took the bag and linked her arm through mine, leading me out of the store. My face was red, and my cock ached with need. A mix of embarrassment and excitement was coursing through my veins.
Carrie turned to me as we sat in the car, her eyes sparkling with mischief. “Oh, I forgot something. Give me your card, Mark,” she commanded.
I nodded, reaching into my back pocket to retrieve my wallet. I pulled out my debit card and handed it to her, feeling a mix of curiosity and anticipation. What was she up to now?
Carrie grinned, taking the card from me. “I’ll be right back,” she said, blowing me a kiss before hopping out of the car and disappearing back into the boutique.
I sat there, feeling a bit foolish with her panties still in my mouth, my heart pounding with a mix of embarrassment and excitement. I could taste her, smell her, and it was driving me wild. I shifted uncomfortably, trying to adjust my bulge as I waited for her to return.
The minutes ticked by, and I found myself growing more and more curious about what she was doing. I tried to peer through the window, but the angle was wrong, and I couldn’t see much of anything. I tapped my fingers anxiously on the steering wheel, my body aching with need, the texture of the panties in my mouth a constant, tantalizing reminder of her.
Finally, after what felt like an eternity, Carrie emerged from the store, a new bag in her hand and a smug smile on her face. I looked at her with curious eyes, trying to discern what she had purchased, but she laughed and shook her head.