Welcome to the dirtiest workout you’ll ever read about. Sierra Knox, Nottingham’s own 21-year-old adult film vixen with platinum blonde locks and EE-cup tits that defy gravity, turns a routine gym session into a sweat-drenched, cum-soaked spectacle. When a 35-year-old regular can’t keep his eyes off her bouncing assets, the empty changing room becomes their playground. From sloppy blowjobs to arsehole tonguing, Sierra films every depraved second for her fans, taking control and pushing boundaries in a 2,513-word filth-fest that’ll leave you gasping. Ready for the ride? Let’s get messy.
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The gym in Nottingham was a sweaty cathedral of grunts and clanging metal, the air thick with the musk of effort. Sierra Knox strutted through the double doors, her platinum blonde ponytail swishing like a whip. At 21, she was a walking provocation—piercing blue eyes that screamed trouble, EE-cup tits spilling out of a neon pink sports bra, their heavy, natural heft jiggling with every step. Her leggings hugged her thick thighs and plump arse, the fabric so tight it was practically a second skin. She thrived on the attention, the way eyes lingered, mouths watered. Today, though, one pair of eyes burned hotter than the rest.
He was there, as always—the 35-year-old regular who’d caught her eye months back. Broad shoulders, dark stubble, a body honed by years of graft, not desperation. No puffed-up gym bro, just quiet, cocksure grit. He was mid-rep on the bench press, sweat slicking his brow, hazel eyes flicking to her as she sashayed past. Sierra smirked, feeling his gaze rake over her bouncing tits. “Dirty fucker,” she thought, loving it.
She started at the leg press, sliding into the seat with a slow, deliberate wiggle. Her leggings stretched as she pushed the weight, thighs flexing, arse lifting just enough to taunt. His reps stuttered—she caught it in the mirror, his focus slipping. By the squat rack, she upped the ante, bending low, arse out, tits hanging like ripe fruit. His reflection betrayed him—jaw tight, trousers twitching as he adjusted his growing hard-on. “Gotcha,” she mused, her pulse kicking up.
The gym emptied out as the evening wore on, leaving just a few stragglers. Sierra finished her set, sweat gleaming on her cleavage, and grabbed her water bottle. He was at the pull-up bar now, muscles bulging as he hauled himself up. She sauntered over, hips rolling, and leaned against a pillar. “Good workout?” she called, voice dripping with sass.
He dropped down, wiping his hands on his shorts, smirking. “Better now you’re here, love. Those squats—fucking hell, you trying to kill me?”
She laughed, tossing her hair. “Maybe. You’ve been staring hard enough. What’s your excuse?”
“Hard not to when you’re flaunting those,” he said, eyes dropping to her tits, bold as brass. “Reckon they’re a workout on their own.”
Sierra stepped closer, close enough to catch the tang of his sweat. “Oh, they are. Wanna feel the weight?” She arched her back, nipples stiffening against the bra.
His breath hitched, but he held his ground. “Don’t tempt me, darling. I’d have you pinned against that wall before you could blink.”
“Big talk,” she teased, trailing a finger down her collarbone, dipping toward her cleavage. “Prove it.”
The gym was a ghost town now—just the hum of a lone treadmill. He glanced around, then grabbed her wrist, yanking her toward the changing rooms. “You’re a dirty little slag, aren’t you?” he growled, voice rough as gravel.
“Filthiest you’ll ever meet,” she shot back, letting him drag her along, her cunt pulsing with anticipation.
Inside the men’s changing room, the air was humid, thick with steam and the faint stench of sweat-soaked towels. He shoved her against the lockers, metal cold against her back. “Been wanking over you for weeks,” he confessed, hands hovering over her tits, teasing the air. “Those fat fucking tits bouncing every time you walk in.”
“Should’ve said something sooner,” she purred, grabbing his hands and slamming them onto her chest. “Feel ‘em then, you dirty bastard.”
He groaned, squeezing hard, thumbs grazing her nipples through the fabric. They hardened instantly, poking out like little bullets. “Fuck, they’re massive,” he muttered, kneading them like dough. She moaned, head tipping back, grinding her hips against the bulge in his shorts.
“Pull it down,” she demanded, voice thick with lust. “Suck ‘em.”
He yanked the sports bra down, her tits spilling free, heavy and pendulous, glistening with sweat. His mouth latched onto one nipple, sucking hard, teeth scraping the sensitive bud. “Taste so fucking good,” he mumbled, tongue flicking wildly. She gasped, fingers tangling in his hair, shoving him deeper.
Her hands slid lower, palming his cock through his shorts. It was rock-hard, thick, throbbing. “Gonna let me play with this, yeah?” she whispered, slipping inside, wrapping her fingers around his pulsing shaft. He hissed, bucking into her grip.
“Fuck, you’re a tease,” he growled, shoving his shorts down. His cock sprang out, veiny and dripping pre-cum. Sierra licked her lips, dropping to her knees on the grimy tiles. “Not teasing now,” she said, spitting on the tip before swirling her tongue around it, slow and sloppy.
He grabbed her ponytail, guiding her mouth. “Suck it proper, you slut,” he ordered, voice raw. She took him deep, gagging as he hit her throat, drool spilling down her chin, coating her tits as she bobbed. Her eyes locked on his, daring him to lose control.
She pulled off with a wet pop, smirking as he panted above her. “Not done with you yet,” she said, fishing her phone from her leggings. She propped it against a bench, hitting record. “Lick me, you filthy cunt. My fans need to see this.”
He raised an eyebrow but dropped to his knees, yanking her leggings and thong down in one go. Her pussy was a sweaty, glistening mess, lips swollen and dripping. “Fucking hell, you’re soaked,” he muttered, burying his face between her thighs. His tongue lapped at her, rough and greedy, slurping up the salty mix of sweat and arousal. “Tastes like a dirty little gym whore,” he growled into her cunt, sucking her clit hard.
Sierra moaned, grabbing his head, grinding against his mouth. “Yeah, eat it, you bastard! Get that tongue in deep!” The phone caught every filthy angle—his stubble scraping her thighs, her tits swaying as she rocked. She tilted her hips, spreading her cheeks. “Now my arse. Tongue my fucking hole.”
He hesitated, then dove in, licking a slow, wet stripe up her crack. “You’re a nasty bitch,” he mumbled, probing her tight arsehole with his tongue, swirling and thrusting. She squealed, legs trembling, the phone capturing her debauched grin. “Fuck yes, rim me proper!” she demanded, forcing his face deeper, his nose pressed into her sweaty skin.
He stood, cock dripping, and spun her around. “Bend over, slag,” he barked, kicking her legs apart. She braced against the lockers, arse out, cunt and arsehole slick from his tongue. Her phone was still recording—she grabbed it, holding it for a close-up as he rubbed his cockhead against her slit. “Gonna fuck me stupid, yeah?” she taunted, zooming in on her dripping pussy. “Tell ‘em how bad you want this.”
“Gonna ruin this tight little cunt,” he snarled, slamming into her, balls-deep in one thrust. She screamed, “Fuck, yes!” and angled the phone to catch her tits bouncing, his cock stretching her wide. He pounded her relentlessly, the slap of flesh echoing, but Sierra wasn’t done playing.
She pushed back, forcing him to slow. “My turn, you prick,” she said, shoving him onto a bench. She straddled him, phone in hand, filming as she sank onto his cock, her pussy swallowing him whole. “Look at that, you lot,” she panted into the lens, bouncing hard, tits slapping together. “Fucking him like the slut I am.”
He groaned, hands gripping her hips, but she slapped them away. “I’m in charge now,” she hissed, grinding slow, then fast, her juices soaking his lap. She switched the phone to selfie mode, zooming in on her cunt as she rode him, dirty talking the whole time. “See how wet I am, you pervs? This cock’s mine.”
They switched again, her on her back on the bench, legs spread wide. She set the phone up on a locker, angled to catch it all. He thrust back in, brutal and deep. “Harder, you cunt!” she yelled, clawing his back. She came hard, squirting over his cock, the phone recording every shudder.
He pulled out, panting. “Finish me,” he rasped. She grinned, handing him the phone. “Film this, you dirty fucker.” She knelt, sucking his cock, sloppy and loud, wanking him with one hand while the other slid between his legs, teasing his arsehole, circling the tight ring. “Like that, yeah?” she mumbled around his shaft, slipping a finger in, slow and filthy.
“Fuck, you’re nasty,” he groaned, phone shaking as he filmed her pumping his arse, sucking his cock, spit and pre-cum dripping onto her tits. She finger-fucked his hole, grinning up at him. “Cum all over me, you bastard,” she urged, and he did—thick ropes splattering her face, tits, and hair, the phone catching every drop.
They slumped against the lockers, breathless. Sierra wiped cum from her cheek, licking it off her finger. “Fucking hell, that’s gold for my fans,” she said, grabbing her phone to stop recording. “You’re a mess, mate. And you enjoyed me fingering you like my little bitch didn’t you?!”
He smirked, chest heaving. “You’re a fucking animal, Sierra.”
She winked, cum still dripping down her tits. “Yes, I am, and I will use you whenever I fucking please and you will be glad to obey me. Now fuck off like a good boy so I can shower your filthy cum off my tits.”