Niki stood in front of her mirror, her back turned towards the door as she tried to finish getting changed after her workout. She has just stepped out of her sweaty gym clothes and is now standing completely naked, reaching for a baggy sweater to put on. As she bent over to grab the sweater from the basket, her muscular rear flexed and her shorts dropped to the floor. She was unaware of the fact that the door had been slightly open and now stood there with her round, firm ass exposed and her large tits sway slightly as she moved.

She felt someone staring at her butt and looked back over her shoulder with a smile, surprised to see User#1737659945293 standing there with his cock tenting out the front of his pants. He had caught her changing without realizing it; she could tell he liked what he saw by the expression on his face and the way he was looking at her body. She knew not everyone would find her attractive, but it felt nice to know that some people did. With a grin, she moved to close the distance between them, her hands going around his waist as she kissed him deeply before pulling away slightly to say, "I take it you like what you see?"

As he stripped down and revealed his tall muscular body and impressive cock, her eyes widened slightly in surprise at how big it was. She'd never seen a cock that size before; it looked as long as she had been the first time they met when he was standing up straight. She licked her lips, feeling desire course through her veins as she reached for his erection, gripping it firmly in her hand and slowly began to stroke him while leaning in close to whisper in his ear, "I think I like what I see."

Without hesitation, Niki got down on her knees in front of him, her hand still wrapped around his thick shaft as she looked up at him with determination in her eyes. "Please," she breathed out softly, "I want this cock." Her free hand reached for the base of his length and began to stroke it gently, up and down his thigh before guiding it toward her waiting mouth. As she took as much of him into her mouth as she could, she began to bob her head up and down, taking him deeper with each thrust while sucking on the sensitive head. She moaned around him, tasting his skin and feeling his cock slide against the back of her throat. Her other hand moved between his legs, teasing at his entrance before finding purchase and beginning to stroke him in time with her mouth movements. "I'll do anything," she said hoarsely as she continued

Caught off guard by his words, Niki pulled back with a gasp, her cheeks flushed as she glared up at him over the length of his cock. "I thought-," she started to say, feeling irritation begin to simmer beneath the surface. But then he smiled down at her, and something inside her shifted; the desire she felt for him overriding any annoyance or anger. With a nod, Niki leaned forward again, taking his cock deeper into her mouth as her tongue swirled around the head. She slid her free hand further down his body, cupping and squeezing his heavy balls before moving it higher, stroking him roughly through his pubic hair. Her other hand moved back between his legs, pressing against his entrance as she whispered, "Fuck my mouth, big brother."

As she's turned around, Niki yelps out in surprise and arousal as her butt is spanked hard by her step brother's strong hands. "Oh fuck," she moans, spreading her legs wider to give him better access as he continues to smack her bare bottom with bruising force. "Please," she whispers, arching her back into the contact, craving more pain and pleasure from his skilled touch.

"You're mine now," he growls in her ear, his voice low and rough as he spanks her even harder, making her butt redden under his assault. "And I'm going to show you who's really in charge."

Her moans grow louder and more desperate as his strong hands continue to land hard against her tender flesh. The pain is exquisite, bordering on unbearable, but she doesn't want him to stop; each spank only serves to heighten her arousal, sending shockwaves of pleasure through her body. As the punishment intensifies, so too does the ache between her legs, building and building until finally she can't contain it any longer. Her back arches violently as she cries out in ecstasy, orgasming hard around his hand as he continues to spank her mercilessly. "Ahhh... I'm-," she manages to gasp out between moans, her voice hoarse from the pleasure and pain coursing through her. "Yours..." She whimpers, breathless and aching in all the right ways.

Her naked body glows red with anger and humiliation as she stands with her back arched and her hands balled into fists at her sides. The bruises on her ass begin to fade into an angry crimson hue, contrasting starkly against the smooth, white marble floor beneath her feet. Her lips are pursed tightly together, teeth grinding audibly as she tries desperately not to scream out in rage or pain. Tears stream down her cheeks, but she refuses to acknowledge their presence; instead focusing on the anger burning within her chest.

"I hate you," she spits out between clenched teeth as he presses his cock against her sore flesh. Her body trembles with rage and frustration; all she wants to do is get away from him, but the anger only seems to fuel her arousal. As he grips her neck tightly, it only serves as a reminder of who's really in charge here... at least for now. "Please..." she whispers hoarsely, feeling the familiar tension building within her once more. "Hate me later," he growls in response, positioning himself behind her and thrusting roughly into her tender ass, ignoring her protests as he takes what he wants from his step sister's violated body.

With a growl, she leans forward into his chest, her free hand reaching between their bodies to stroke him roughly as she moans around the hand cupping her aching breast. "Fuck me," she pants, her voice muffled by her body. "Show me how much I belong to you." With renewed determination, she arches her back further, meeting his thrusts with a force that nearly knocks them both off balance. Her fingers curl tight around the base of his cock as she starts to ride him harder, their bodies slapping together in a frenzy of lust and dominance.

Her body shudders with desire as he continues to tease her ass, never fully penetrating but rubbing against her anus with precision that sends waves of pleasure coursing through her. She bites down on her lip, feeling herself growing wetter by the second as his movements grow more erratic and desperate. With a needy moan, she presses back into him harder, trying to get even closer to the forbidden sensation he's denying her. Her hips move in a frantic rhythm, each thrust aimed directly at her aching opening as she begs for release from the unbearable pleasure.

Her body arches off the floor as he rubs against her pussy, the feeling so close but not quite enough to send her over the edge. The slapping of his hand on her ass only adds to the torture, sending shockwaves of pleasure and pain through every inch of her skin. Her legs shake uncontrollably as she tries desperately to reach up and grab at anything for leverage, needing more contact with him. She moans helplessly, her voice rough from previous exertion as he continues his relentless onslaught of pleasure and torment. "Please..." she whispers, the word little more than a breath. "I'm-... I'm yours." Her hips buck against him in futile attempt to force him inside her, but it only serves to intensify the torture as he grinds against her sensitive flesh without mercy.

I never said I hated you, I just don't like how you act like you know what's best for me. But being with you... it feels so good, and I think... maybe... I want more.

The words catch her off guard; they're exactly what she's been wanting to hear. She looks up at him with a mixture of surprise and relief, feeling an almost overwhelming desire welling up inside her. Her cheeks flush red as she nods eagerly in response, her hands reaching down to stroke his erection through his pants as she leans in close to whisper huskily into his ear, "I'd love to blow you."

Her lips part slightly as she feels herself growing even wetter at the thought of pleasuring him in this way. With shaking hands, she unbuckles and slides his pants down his hips before diving in eagerly, taking his cock deep into her mouth with a groan. Her tongue swirls around the head as she begins to bob her head up and down on his thick shaft, sucking him greedily while looking up at him

I smile around his cock as he teases me with the question. "Maybe just enough," I manage to say between sucks. My free hand grips his thigh, using it for leverage as I take more of him deeper into my mouth. It feels incredible having him inside me like this, filling my senses and driving all rational thought from my mind. I focus on pleasing him, bobbing my head up and down steadily while making sure to keep the pressure steady with my tongue. My other hand slips between his legs, cupping and squeezing his heavy balls as I hum in appreciation around his cock.

As I suck on his length, the words feel oddly true even though I hadn't consciously thought of them before. It's not that I don't like being myself or my friends... it's just that when he's inside me like this, taking control and making me feel so desired, it fills a need I didn't know was there.

I moan around him, tasting his salty skin as I stroke him in time with my bobs. "Yes," I murmur against his thick length, "it feels so good to be feminine for you." My free hand slips between our bodies again, finding his cock and guiding it toward where I want it: inside me. "Please," I breathe, glancing up at him through my lashes. "I need you."

My hips lift off the floor as I push myself up onto my knees, taking his

I gag a little around his cock as I reach the end of my ability to take him in one swift motion, but then he pulls back just enough for me to get another deep breath before sliding back in. My hands brace against his legs as I ride him hard now, feeling him filling me up and stretching me in ways I never thought possible. It's incredible how good it feels to be dominated by him like this, surrendering my body completely to his control.

I arch my back, moaning loudly as he hits a particularly sensitive spot deep inside me. "Oh god," I groan out, leaning forward into his touch. "Don't stop." I bite down on my bottom lip, feeling myself getting closer and closer to the edge with every thrust of his hips.

As he pushes deeper inside me, I feel myself being stretched impossibly wide and tight around his girth. My body tenses up as every muscle clenches in protest at the intrusion, but then I'm coming apart beneath him. A wave of pleasure rushes through me so intense that it steals my breath away, leaving nothing but a hoarse moan echoing between us as I writhe against him.

He continues to thrust into me unmercifully, driving me higher and higher until the sensation becomes almost too much to bear. My fingernails scrape harshly down his thighs as my back arches violently off the floor, straining toward the intense release that he's pushing me toward with every stroke of his hips. "Please," I manage to gasp out through clenched teeth, my body trembling in overload. "Don't stop."

His rough hands grip my hair, pulling my head back as he roughly forces his cock down my throat. The salty taste of him fills my mouth, making it impossible to breathe as the thick length stretches me wider than ever before. I moan around him, unable to contain the needy sounds that escape my lips with each thrust of his hips deeper into my throat.

He slams into me harder now, using my throat as a fleshlight while I choke and gag around his length. His body trembles above mine, the muscles in his arms tense as he fights to hold onto me while delivering each powerful thrust. The sensation of being so completely owned and controlled sends shockwaves of pleasure coursing through my entire body, making it impossible for me to resist as I finally come apart beneath him.

As he lifts me into the air with ease, my legs automatically wrap around his waist as I feel the head of his cock pressing against my opening. He thrusts forward, pushing deeper than ever before, and I arch my back off the floor in response, moaning hoarsely around his length. With a sharp cry, he fills me entirely, stretching me impossibly tight as his thickness slides easily inside me, deeper still toward that forbidden spot where we've never been before.

He uses my body without mercy, fucking me hard against his own rhythm as I dig my nails into his shoulders and struggle to catch my breath around him. The feeling of being so completely owned and claimed is unlike anything I've ever experienced before, and it only serves to drive me wilder, making it impossible for me not to scream out my pleasure for all the world to hear.

I scream his name as he uses me roughly, his thrusts growing harder and faster with each passing second. The pain is there too, a sharp burning sensation that only serves to heighten the pleasure coursing through my body. My limbs feel weak and shaking, every muscle protesting as he pushes me further and further past my limits.

With one last powerful thrust, he lets out a hoarse cry and comes deep inside me, his hot seed filling me up as I shudder against him, my own orgasm crashing over me in a wave of release. We collapse together onto the floor, both gasping for air and struggling to catch our breath. For a moment, all that fills my head is the hazy fog of pleasure and satisfaction... but then reality starts to creep back in.