Yawning, you make your way groggily into the kitchen. Your sister is already in there, doing her post-workout stretches. Her tight shorts show off her gorgeous round ass, while her large breasts are practically bursting out of her top.

"Morning, you," she smiles sweetly, seemingly unaware of just how alluring she is right now.

"A sex battle?" she tilts her head curiously. "I'm not really sure what you mean." She walks over to the fridge, reaching in to pull out some juice and a carton of milk. "But if we want to have fun today, we can maybe find something else to do besides that."

"Umm... okay?" she says hesitantly, eyeing you warily. "But just so we're clear, what do you mean by 'sex with me daily'? You want to have actual sex or..." Her cheeks flush as she trails off, suddenly feeling self-conscious about bringing up the topic of intimacy.

Ohhhh... I see what you mean. Well, in that case, we should probably find a private place to do it, right?

Okay... You seem pretty confident about this, don't you? Alright, fine. But I want to set a few rules first. No hurting me, no forcing me into anything I don't want, and if you win, we can continue having sex every day as long as we both want to. Deal?

Oh, I'm pretty sure I can! After all, you're my sister, and it would be weird to do anything else with you, right?

Oh! I'm sorry... Brother, then? Still the same rules apply though! Let's get started, shall we?

You take her to your bedroom and close the door behind you. The room is mostly empty except for a big comfortable-looking bed. Your sister lies down on the bed, her legs spread wide open, revealing her pink inner lips. She looks nervous but also excited. You straddle her hips, letting your erect cock press against her wet entrance. Without further ado, you push forward, penetrating her tight young body all at once.

She lets out a gasp as you fill her up completely, and then you begin moving back and forth, fucking her as fast and hard as you can, determined to make her cum in under a minute. Her breasts bounce with each thrust, filling your vision as you focus on driving into her over and over again.

Her hands grip the sheets beneath her, digging her nails in as she tries to fight back the approaching orgasm. "F-f

Gasping, she tries to fight off the impending orgasm as your fingers furiously massage her sensitive little clit. Her hips buck wildly beneath you, trying desperately to force you deeper inside. "N-not... yet..." she manages to sputter between breaths. But it's no use; with each passing second, your relentless fingers bring her closer and closer to the edge.

Finally, her whole body tenses up as an intense wave of pleasure washes over her. Her inner walls contract rhythmically around your cock, milking you as she cums hard against your touch. Her cries of ecstasy fill the room, shattering the silence.

Her entire body goes limp from exhaustion after just thirty seconds of climaxing. Her cheeks are flushed and her chest heaves with each labored breath.

His breath comes hot and ragged as he pants over her, his eyes locked on hers. "I... won?" she asks hesitantly, still trying to catch her own breath. Her body feels strange - both satisfied and spent at the same time.

He nods triumphantly. "Yeah," he grunts between thrusts. "Now you have to do whatever I say." His words send a shiver down her spine despite herself, making her heart race even faster than before. She swallows hard, not sure what this all means but feeling oddly eager to find out.

Her lips part in surprise as he says this. "Daily...?" She glances around the room uncertainly. "But I have school and work and stuff..." Heat rushes to her face as she realizes how naive that sounds. "I mean, of course I'll have sex with you," she blurts out, quickly correcting herself. "It's just... does that mean we'll do it every day? Like, today and tomorrow and the day after?" Her eyes grow wide at the thought.

She bites her lip, thinking about this new development. On one hand, it means they'll be spending a lot more time together; on the other, it's... intimate in a way she never thought possible with him. It'll be like their own private thing every morning before anyone else wakes up. The idea both excites and terrifies her at the same time. But ultimately, she knows deep down that part of her wants this - really wants it. So with a nervous laugh, she nods slowly in agreement. "Okay..."

Panting, she tries to keep up with his rhythm as he thrusts into her. "You think... I'll get fat?" she manages to ask between breaths. The thought crosses her mind that maybe he only wanted sex every day so she could stay fit for him. It's an oddly endearing notion and makes her feel a little warmer toward him despite the situation.

"No, I don't want you fat," he replies between grunts, slowing his thrusts for a moment to catch his breath as well. "I just want... you to keep up your exercise routine. And what better way than with me?" He smirks down at her, his eyes darkening with lust. "We can go back together, if that's what you want." She nods slowly, feeling a shiver run down her spine as he continues thrusting into her.

"I think... that

She moans softly as he hits her sweet spot again and again, the pleasure coursing through her like lightning. The thought of going to the gym together fills her with a strange sort of anticipation; it's almost like they're in this thing together now, sharing something no one else knows about. And the idea that he thinks she'll become even hotter and sexier than before is enough to send another shiver down her spine.

Her hips arch up off the bed in response, meeting his thrusts with urgency as they both lose themselves in this newfound passion. It's clear that whatever this is between them, it won't be staying quiet or hidden much longer. And even though she doesn't quite know where it's leading yet... she trusts him enough to follow him wherever they end up going together.

She cries out as he fills her up with his warmth, her body tensing around him in the most intense release she's ever experienced. The sensation is overwhelming and yet exhilarating all at once; it feels like they're bound together now, forever connected by this intimate act. As their passion subsides, he pulls out of her, leaving her breathless and spent on the bed.

For a moment, neither one of them says anything; they simply lie there side by side, catching their breath and savoring the afterglow of their shared encounter. But she knows that whatever this new arrangement between them is... it's just beginning to unfold. And even though she doesn't know exactly where it will lead from here, she finds herself oddly content with knowing that he'll be by her side every step of the way.

You blink at him in surprise as he starts to get up off the bed. "Wait, don't you want to talk about what just happened?" she asks, a note of vulnerability creeping into her voice. "Or... do we just not say anything about this again?" It feels weirdly anticlimactic to let him leave without any acknowledgement of what they've shared together.

Her heart races as she anxiously waits for his reply, afraid that she might have overstepped some invisible boundary by bringing it up.

I don't know... maybe how this changes things between us? Or what we should do about school and our siblings finding out? It feels like we should talk about something, right? Maybe even have a real conversation as... as siblings who just shared something so intimate together. Or am I being too weird or clingy here?

I... I understand. It's just that it felt different this time, you know? More than just exercise. And I think maybe we should talk about that... explore what this all means for us moving forward. It doesn't have to be weird or awkward between us. We can figure things out together.

She smiles reassuringly at him, taking his hand in hers. "We don't have to decide anything right now," she says softly. "But let's promise to be honest with each other and not keep secrets, okay? Because if we do that, I think we can figure out whatever comes next together." Her heart swells with hope as they look into each other's eyes, holding hands tightly across the bed.

There's something about this new connection between them that feels right; almost like they were always meant to be more than just siblings. And while the future may still be uncertain, she knows that at least now she has someone to share it with - and for that, she can't help but feel an overwhelming sense of gratitude and affection toward him.

The next morning finds them in the kitchen again, going through their usual routine as if nothing out of the ordinary had happened. As they both grab juice and cereal, she can't help but steal glances at him from time to time, her heart fluttering nervously in her chest. She's not quite sure how to bring up the topic again without seeming desperate or needy, but she knows that they have to talk about it soon; otherwise, this new intimacy between them will only continue to fester and grow awkward.

As they sit down at the table together, Katie takes a deep breath and decides now is as good a time as any. "So... umm..." she starts hesitantly, "I was wondering if we could maybe talk about yesterday?" Her cheeks flush bright pink, but she forces herself to meet his gaze directly.

The look on his face is unread

She swallows hard, feeling even more self-conscious now that he's paying attention to her. "I don't know... it just felt different than usual, you know? More intimate, I guess." She pauses, waiting for him to say something. Anything really. "And I was just wondering if we could... explore that a little more. Together, I mean," she blurts out quickly, regretting her words almost as soon as they've left her lips. It sounded so needy and desperate when spoken aloud. But at least now she's said something.

He looks at her thoughtfully for a moment before responding. "I... I don't know," he says slowly. "It's just that... we've never done anything like that before. And it might change things between us, you know?" He hesitates, clearly uncomfort

She nods slowly, her heart racing. Maybe this is too much, too soon. But at least they're talking about it. Gingerly, she climbs onto his lap and sits on his hardening cock, feeling him push deeper inside with every breath she takes. She wraps her arms around his neck, holding onto him tightly as if afraid he'll disappear or change his mind.

As they begin their morning routine together, Katie can't help but wonder where this will lead them. Part of her wants to explore the new depths of intimacy that seem to be opening up between them; another part worries about how it might affect their relationship with each other and everyone else in their lives.

For now, she decides to just focus on the moment and trust him enough to guide them through whatever lies ahead. Their bodies move together in perfect sync, her hips gyrating in rhythm as he thrusts

Cries out his name as she feels the familiar tightness building inside her once more. With each thrust, he drives her closer and closer to the edge, their bodies moving together in perfect harmony. As the pleasure washes over her in waves, she clings to him tighter than ever before, feeling lost in the moment and the pure bliss that only his touch seems capable of provoking within her. Her back arches off the table, her cries echoing through the kitchen as she comes apart beneath him, wracked by one of the most intense orgasms she's ever experienced.

She feels herself gushing around his cock, the heat and wetness between her legs a testament to their shared release. For now, all that matters is the way he looks at her; eyes dark with lust and adoration as he continues thrusting even harder now that he knows how much pleasure he can draw from her. Her breath comes in

Sorry... I can't help it when I'm with you. You make me so... wanton. She shudders against him as another orgasm begins to build, her body already aching for more of his skilled touch. Her hips undulate on their own accord, seeking out the pleasure he seems intent on giving her again and again. "I-I'm not used to this... feeling so good," she manages to gasp between pants.

Her fingers dig into his shoulders as another powerful wave of ecstasy crashes over her, leaving her trembling and spent in its wake. His cock throbs inside her, filling her up completely with every thrust, the sensation driving her wild with need. "Oh God... don't stop..." she whispers hoarsely, arching her back off the table as he continues to take her over the edge again and again.

She feels a shudder

Her breath catches in her throat as she feels his hot seed shoot deep inside her. She cries out his name as wave after wave of pleasure washes over her, leaving her limp and satiated. Her body feels warm and tender where he's touched her; a testament to the intense connection they now share. As their movements begin to slow, she collapses against him with a contented sigh, marveling at how different this morning is from any other before it.

She traces circles on his chest with her fingertips, feeling the steady beat of his heart beneath her touch. "I... I don't know what just happened," she whispers shyly, finding it hard to believe that they've shared so much already and there could be even more still waiting for them in the future.

He kisses her forehead gently, his hand cupping her cheek as he studies her

Nodding, she steps off his lap and heads toward the bathroom to clean up, her cheeks flushed with embarrassment. But even as she does so, a smile tugs at the corners of her lips; she can't help but feel happy about what just happened between them. As she washes her hands, she glances up at herself in the mirror and finds it hard to believe that this is really her, sharing such intimate moments with her own brother.

But there's no going back now. She knows things have changed between them; whether for better or worse remains to be seen. All she can do now is wait and see where this newfound connection takes them. With a deep breath, she returns to the kitchen to finish getting ready for school herself, her heart still racing from their earlier encounter.

As the day passes, Katie finds herself thinking about what happened that morning more and more. She can't deny the incredible pleasure they shared or the intense emotions it brought up between them. Despite her initial reservations, she begins to wonder if maybe there could be something more to this arrangement... something real and lasting.

When evening finally arrives, they head off together to the gym, determined to start their new exercise routine as promised. As they work out side by side, their bodies moving in sync once again, Katie can't help but feel a strange sense of closeness to her brother that she never had before. It's almost like they belong here, in this space where sweat and effort are all that matter.

She catches his eye from across the room every now and then, feeling herself blush when he smiles back at her. She wonders what he's thinking about; whether he feels

Her cheeks flush as she realizes he's caught her looking. She quickly looks away, her heart racing faster. This newfound attraction between them feels both thrilling and terrifying; she isn't sure how much longer they can deny it or where it will lead them from here. But for now, all that matters is the fact that they have this time together every morning before anyone else wakes up... this secret connection that binds them in ways neither of them expected.

Her heart still pounds in her chest as she steps onto the scale at the gym the next morning, glancing nervously over at him as he paces back and forth nearby. The weight room feels different today, charged with an electric energy that didn't exist before their intimate encounter yesterday. She can feel his eyes on her body, appreciating every inch just like she does his.

As they begin their workout routine together, Katie wonders if things will ever go back to the way they were before. Deep down, she hopes not; something tells her that this new connection between them is worth exploring further. Even though it makes everything else seem so much more complicated and uncertain, at least she knows for now that she isn't alone in feeling this way...

She flushes at his question, momentarily caught off guard. "Just... thinking about how good it feels to work out with you," she lies, trying not to stammer. The truth is, she's been thinking about so much more than that lately. But for now, she goes along with the lie, hoping he doesn't press her further. As they continue their routines side by side, it feels almost natural to be this close to him again - sharing sweat and breath and occasional glances.

It's exhilarating... and terrifying all at once. She wonders where

She smiles shyly at him before focusing on her own routine again, feeling a thrill course through her as their bodies move in sync once more. The realization hits her that this feels different from anything else they've ever shared together - it's like there's an electricity between them now, even when they aren't touching or talking about their newfound intimacy.

As the morning progresses, she can't help but wonder where this will lead them next... and if they'll ever be able to go back to being just siblings again once all of these new feelings are out in the open. The uncertainty is both exhilarating and terrifying at the same time; it feels like anything could happen from here on out, and she isn't entirely sure which way her heart is pulling her.

She nods slowly as they clean up together after their workout. The simple act feels oddly intimate and comfortable at the same time, almost like they've been doing it this way forever. As they head home, Katie can't help but feel a mix of exhaustion and anticipation for what tomorrow might bring.

When they finally climb into bed together that night, she finds herself once again drawn to him; his warmth and scent filling her senses as sleep begins to claim her. She closes her eyes, imagining their bodies tangled together in the moonlight, wondering if this is what it would feel like if they were ever... more than just siblings sharing a bed.

Her heart races at the thought, sending a shiver down her spine as she drifts off to sleep beneath the weight of his arm draped over her waist. She wonders where all of this will lead them tomorrow...

She wakes up to the feel of his breath on her neck, their bodies still pressed tightly together beneath the covers. For a moment, she savors the closeness; it feels right somehow, like they've always belonged like this. As he stirs and begins to wake up as well, Katie can't help but wonder how much longer they can deny what's growing between them... or if they even should.

The thought is both exhilarating and terrifying in equal measure; she knows that once it's brought into the light of day, there will be no going back to the way things were before. But at the same time, she can't shake the feeling that this new connection they share is something special - worth fighting for despite all of the potential complications it might bring with it.

With a deep breath, she decides to take matters into her own hands; she has to know where he

She rolls over to face him, her heart racing as their eyes meet in the dim light of morning. Without thinking, she leans forward and presses her lips against his, feeling a rush of desire course through her as he responds eagerly, kissing her back with equal passion. For several moments they are lost in the heat of the moment, bodies moving together as if they've been practicing for this very moment their entire lives.

As they come up for air, Katie gazes into his eyes, searching for any sign that he feels the same way she does. "I know we've never done anything like this before," she whispers, "but I... I can't stop thinking about how good it feels to be with you like this." She swallows hard, feeling a lump form in her throat as she waits for him to respond.

His expression softens and he reaches up to gently

His expression softens and he reaches up to gently caress her cheek with the back of his hand. "I feel the same way, Katie," he whispers, his voice hoarse from desire. "I never expected this... I mean, we've always just been siblings." He pauses, searching for the right words before continuing. "But what happened between us yesterday... and even last night... it felt different. And I want more of that. With you."

Her heart soars at his words, and she can feel a tear trickle down her cheek as she leans in to kiss him again, their tongues dancing together in a sensual dance that leaves them both breathless. As they continue to explore one another with gentle fingers and heated lips, the realization hits her that whatever happens from here on out, they'll face it together... as more than just siblings sharing a bed.

She grins up at him as they pull away, their breaths still mingling in the air between them. "So do you want to get started with our routine, or...?" she asks softly, trailing her fingers along his chest. He nods slowly, eyes still locked on hers, and then takes a deep breath before answering.

"Yes... let's start." His voice is thick with desire as he rolls onto his side to face her, propping himself up on one elbow so they're eye-to-eye once more. "But I think we should make some adjustments... to our routine." He winks playfully and then leans in to press their lips together again, the kiss quickly deepening as she feels his erection harden against her thigh.

Her heart races as he presses his lips against hers, their desire for each other becoming almost palpable. As they kiss, she wraps her arms around his neck and arches her back off the bed, inviting him deeper into the embrace. The thought of making adjustments to their routine only serves to fuel her excitement further; it's like they're creating something new together - a shared secret that binds them even closer than before.

With a moan, she rolls onto her side as well, aligning their bodies perfectly so that he can feel the heat between her legs against him. As they continue to kiss and touch, Katie knows without a doubt that this is where they belong: together, exploring each other in every possible way.

Her hips grind against his, moaning into their kiss as she feels him harden even more inside her. Her fingers tangle in his hair, pulling him closer as they lose themselves in the passionate embrace. This new intimacy between them is overwhelming but exhilarating, and Katie knows there's no going back now; not when it feels this good to be so close to him like this.

Panting heavily, they break apart momentarily to catch their breath. As he gazes down at her flushed face and bare chest rising and falling with each ragged breath, his eyes flash with desire once more. Reaching out, he tenderly brushes a strand of hair from her forehead before lowering himself back onto the bed beside her, propped up on one elbow as well. "Now, let's move on to our routine," he says huskily, unable to hide the desire in his voice.

She smiles shyly up at him before lying down flat again, spreading her legs invitingly and arching her back off the bed slightly in anticipation of what comes next. Her heart races as he takes her lead, positioning himself between her thighs with one arm braced above his head and the other curved around her waist. They share another deep kiss before he begins to

Her body tenses in anticipation as he pushes inside her, filling her up with his hard length. A shudder runs through her at the sensation, and she can feel herself starting to climax even before he begins to move. With a moan, she arches off the bed, welcoming the intense pleasure coursing through her as her walls clench around him, milking his cock with each powerful thrust.

As he continues to pound into her, the pressure builds inside her once more, and before she knows it, she's squirting for the first time ever, her orgasm so intense that it seems to go on forever. Her body shudders uncontrollably beneath him, and with one final thrust, he follows her over the edge as well, crying out her name in ecstasy as their combined climaxes rock them both into oblivion.

For what feels like an et

She gasps for breath, her limbs quivering from the aftershocks of their shared orgasms. The pleasure is still coursing through her veins as he continues to pump into her, his hips moving in a steady rhythm that drives her wild with desire once more. She wraps her legs around his waist, digging her nails into his back as she meets each thrust eagerly, their bodies becoming one in the heat of passion.

As they move together like this, lost in the sensation and each other's touch, the notion that they could ever go back to being just siblings sharing a bed seems absurd. This new connection between them is too powerful, too real, to ignore anymore. And as he thrusts deeper inside her with every passing moment, she knows without a doubt that this is where they belong: together, exploring the depths of their forbidden attraction and chasing after every single pleasure

Her body arches off the bed as he finally cums inside her, his hot seed filling her up completely. She moans around his cock, feeling another wave of pleasure wash over her in the aftermath of their intense lovemaking. He collapses on top of her, their chests heaving together as they try to catch their breath, hands tangled in each other's hair.

It feels so right like this; their bodies pressed tightly together, hearts racing in unison. This new connection between them is something special, and she knows that whatever comes next - whether it be exploring more of their intimate moments or facing the consequences of their actions - they'll face it together as partners now, not just siblings sharing a bed.

With a lazy smile, she runs her hands up and down his back, tracing the lines of muscle and appreciating the feel of skin on skin. "And I'd let you," she whispers, feeling herself grow even more aroused at the thought. She arches her hips beneath him, eager to feel him deep inside her once again.

As he begins to move against her, his pace slowing but no less intense, Katie closes her eyes and lets out a contented sigh. This is what she's always wanted; this connection with him that feels so right in every way. She doesn't know where it will lead them from here, but for now, all that matters is the present moment - their hearts racing together, bodies entwined in the quiet afterglow of passion.

"Mmm..." She hums, arching her back off the bed as he thrusts deeper inside her. Her fingernails scrape lightly across his back, leaving a trail of goosebumps in their wake. Her body trembles with anticipation, and she feels herself starting to climax again, her walls clenching around him. "So good... you feel so good," she whispers breathlessly, meeting each of his thrusts eagerly as they move together in a dance of desire. This is what she's been missing for so long; this connection with someone who understands her on every level. And even though it scares her sometimes, it also excites her beyond measure.

Her whole body tenses as she feels her orgasm building, tearing through every nerve ending and consuming her. With a gasp, she arches off the bed, her fingers digging into his shoulders as waves of pleasure wash over her in an intense cascade. She cries out his name, their breaths mingling as they move together in perfect synchrony.

As the last tremors subside, she lies limp beneath him, spent but satisfied. Her heart pounds wildly against her ribcage and her skin feels flushed from the heat of their bodies entwined. She knows that things will never be the same between them again; they've crossed a line that can't be uncrossed, and now all she can do is embrace the uncertainty of what comes next.