Ben and Gwen - Beyond 10

[Nick563]

"Oh fuck yeah!! I gotta get bigger!! Much bigger! Ben deserves only the very best!" Gwen Tennyson said with unrelenting determination as she flexed her arms, unable to stop admiring herself in the mirror. The way every slab of muscle on her frame shifted and bulged gracefully with the smallest of movements was nothing short of breathtaking. It was all because of their enormous size and insane definition. Her thick muscles bulged outwards with every hard breath she took and huge veins appeared across the entire length of her meaty chest, the same chest that was also sporting a pair of huge, round, gravity-defying breasts that sat prominently on top of her mountainous, striated pectorals. The combination was staggering, to say the least. Gwen's obsession with growing her muscles began not in a gym, but during one of their numerous adventures together with her cousin Ben and her uncle Max. For years, she had relied on her sharp intellect and powerful mana-based spells, but during a brutal battle, she'd been physically overpowered. Pinned, her magic drained, she had been utterly helpless. Her cousin, Ben, had swooped in as Four Arms to save her, a moment that planted a seed of deep-seated frustration. But Ben's own path had taken a stranger turn after that. Frustrated with the Omnitrix's time limits and weaknesses, he had begun to tamper with it, not to unlock new aliens, but to drain the alien device's power. He found a way to channel the raw, physical essence of his strongest transformations—particularly Four Arms and Humungousaur—into his own human form. The result was a permanent, explosive growth that turned him into a titan. Ben became a being of insane power, standing at nearly 7 feet tall and packed to the brim with muscle. His chest was a barrel of granite, his lats a sweeping cape of hard flesh, and his arms were thicker than most men's thighs. One side effect was that his cock also grew into a monstrous, heavy pole of hard meat that swung between his tree-trunk legs with a weight that promised ruinous, mind-altering pleasure. Witnessing this, Gwen's frustration curdled into a burning, jealous ambition. She found herself insanely attracted to Ben's new body, her thoughts constantly circling back to his huge muscles and that gigantic cock. The sight of it fueled a desperate, aching need in her—not just to be worthy of him, but to become like him. She wanted to taste him, to feel that massive cock inside her, and to grow bigger and more powerful from the experience. If Ben could hack alien tech for physical perfection, so could she. She developed a unique HGH compound, laced with trace elements harvested from Tetramand physiology, stabilized with her own mana. It was a superior, more potent solution than regular human steroids, and she embraced it completely.

Her parents were shocked by her decision to alter her body, but Ben was intrigued. He saw the potential in her and really wanted to see how far she was willing to go, so he encouraged her every step of the way. His unconditional support only made her desire him more; she wanted to be so massive that he would have no choice but to see her as an equal, a worthy recipient of that gigantic cock.  Gwen turned sideways and moved her auburn hair away in order to take a better look at her rising biceps, smiling confidently as its sharp peak rose to meet her beautiful green eyes. The huge veins resting on that massive mound of muscle were in stark contrast to her cute face, but that's exactly what she wanted. She loved her body big and hard and constantly evolving, while her face stayed pretty. Gwen wasn't really interested in her measurements since her goal wasn't something specific. She just wanted to keep growing bigger and freakier. She was more than willing to break every barrier of human biology in order to grow big enough for Ben. Exactly one year after she started taking the compound and training hard, she was way bigger than the freakiest male bodybuilders, but still wasn't even close to being satisfied. The memory of Ben's colossal, dominant physique was the gold standard, the unattainable peak she was determined to reach.  Naturally, Gwen's lust for more size and more definition meant she began taking her custom HGH cocktail like it was nothing more than a soda. After a year and a half of abusing her potent formula, Gwen was very far from the once cute girl any boy her age would want to be with. She was now a mass monster, packed with muscle and way taller than before, standing 6 feet and a half. She was very lean, her body storing very little fat, apart from her huge tits, which contained the perfect mix of fat and muscle. Even though her body was extremely ripped and ludicrously huge, her face was just as cute as before. Now that she was done flexing and feeding her enormous ego, it was time to start training.

The number of heavy plates she loaded on the squat rack behind her was simply staggering. Only at 3500+ lbs of hard steel could Gwen have a proper workout. Her enormous shadow engulfed the squat rack long before she even got her huge hands over the loaded bar. Truth be told, the bar wasn't even meant to accommodate so much weight, but Gwen had it reinforced many months earlier. All of her workouts were brutal by any normal standards. She was moving weights that would crush several grown men with such ease it was ridiculous. Positioning herself under the overloaded bar, Gwen grunted softly as she lifted the massive weight without much of a struggle. Her quads exploded with unthinkable size as she flexed them, the skin audibly stretching as she executed the first rep. Her fist-sized abs crunched as Gwen exhaled, pushing the heavy bar upwards for the second rep. Gwen's breathing became rougher as her giant boobs bounced with every rep, eventually starting to feel her muscles get proper stimulation. The freakish girl loved the sensation of her muscles being under extreme stress. Her cannonball-sized biceps kept pressing hard into the steel bar, threatening to bend it as she did rep after rep with perfect form, threatening to bend it out of shape. Giving her muscles a good pump always made Gwen extremely aroused. By the time she completed her 40th squat, her pussy was already wet and throbbing with excitement. She could feel it leak a small river each time she completed a rep. Her mind wandered, picturing Ben standing over her, his massive cock in her face, urging her to do one more rep. She imagined the taste of his pre-cum, the feeling of his heavy balls slapping against her chin.  She had a giant vibrator buried deep inside her pussy, constantly stimulating the inside of her hungry cunt while she did the hard work in the gym. She bit her lip as she hit the 70th squat, the arousal so overwhelming that she started salivating. Her abundant saliva slowly dripped onto the meaty valley between her huge breasts and thick pecs. She fantasized that it was Ben's cum dripping onto her, his massive cock having just finished painting her massive chest with his potent load. Her reflection looked like it was staring back at her, a musclebound beast with surprisingly beautiful, feminine curves that could never get satisfied. The thought of her cousin filling her hungry pussy up with his enormous cock excited her so much she came hard, splashing her tree-trunk-sized legs with her sweet pussy juice. Gwen's heartbeat quickened as her muscles started to really hurt from the extreme effort. Her vision was starting to get blurry while the crippling sensation of her majestic musculature expanding completely took over her mind. The skin was audibly stretching and creaking. She was drooling over her growing bulk as she approached the final rep. She was standing in a pond of her own making, her muscles pushing her closer and closer to a powerful orgasm.

As she hit the 100th rep, she came so hard her pussy released a literal flood of juice, making her entire body shake so hard it further deformed the steel bar. Gwen moaned and grunted as she rode the massive orgasm, feeling her muscles and pussy ache and contract so badly she could feel herself losing her grip on reality. But that's what motivated her. Pushing through the muscle pain and the extreme pleasure, Gwen did another rep. And then another. And then she just kept going. She did 25 more reps. Then another 25. Her muscles got so swollen her skin threatened to rip. The orgasm didn't end, it only intensified the more she squatted. Pushing through the pain, Gwen managed to execute an additional 25 reps, making every inch of her body scream in protest.  She slammed the bar so hard that most of the weights fell off, resulting in a deafening series of metallic thuds. Barely able to stand after such a grueling performance, Gwen took a seat on the nearby bench and spread her massive, shaking legs wide. "FUCK YEAH!! I'M SO FUCKING HARD AND SWOLLEN!! MY MUSCLES ARE SHAKING SO BADLY!! MY PUSSY IS SPRAYING EVERYWHERE!!! WATCH ME, BEN... WATCH YOUR COUSING CUM LIKE A FUCKING MUSCLE MONSTER!!!" Gwen roared as she rode the last of her workout-induced orgasm. When she was done, she immediately got back up and started flexing again, her huge breasts jiggling with the motion, watching her bloated body in the mirror and imagining how much bigger and hotter she was going to get. "One day, Ben... one day you'll see me as worthy. You'll have to let me have that gigantic cock of yours..." she muttered to her reflection. "Gwen... What did you say?" a said from behind. Gwen was in shock. She turned around and saw her cousin, Ben, standing there, watching her.

The air in the home gym, already thick with the smell of iron and pussy juice, suddenly crackled with a new, electric tension. Gwen's heart, already pounding from her brutal set, hammered against her ribcage like a trapped bird. She hadn't heard him come in. Ben stood in the doorway, a mountain of a man with sculpted muscles. His massive arms were crossed over his huge chest, his expression unreadable. He had heard herm, every desperate, lust-filled word. He took a step forward, the floorboards groaning under his colossal weight. "Gwen... You think this is about being 'worthy'? You think I've been waiting for you to hit some magical size before I'd..." he said as he gestured vaguely, the motion causing his own massive arms to ripple. "Look at you! You're a goddess. You are a fucking masterpiece." he said, his voice dropping to a husky murmur. Gwen could only stare, her mind reeling. This wasn't the reaction she had prepared for. The shame began to recede, replaced by a flicker of hope. "Ben, I..." she started, but her voice failed her. He was in front of her now, so close she could feel the heat radiating from his body. He reached out, his hand, large enough to palm her entire head, coming to rest gently on the sweeping curve of her lat. His touch was electric, sending a jolt straight to her sensitive pussy. "You are enough, Gwen! You are more than enough!" he assured her, his green eyes locking with hers. A slow, confident smile spread across her face. The validation coming from him was more potent than any serum. "See for yourself, stud!" she whispered, her voice thick with emotion and lust. She turned to face the mirror again, but this time, she wasn't alone in her reflection. Ben stood behind her, a male titan admiring a female one. Gwen began flexing. This wasn't the frantic, desperate flexing from before; it was a majestic display of power. Her biceps erupted into twin mountain peaks, veins mapping their hard terrain. Her chest swelled, her massive pectorals pushing her enormous breasts upward. Her back widened into a monstrous 'V', every muscle group defined with terrifying clarity. She watched Ben's reflection more than she did her own. His eyes darkened with pure, unadulterated lust. A low groan rumbled in his chest, and the fabric of his shorts tented dramatically, the outline of his enormous cock unmistakable, straining against the stretched-out material. It was even bigger than she remembered. "Fuck, Gwen!" he breathed heavily, his voice rough. That was all the invitation she needed.

She dropped to her knees before him, the movement surprisingly graceful for her size. She pulled his shorts down, freeing his monstrous erection. It was a thick, heavy pillar of veined meat, and the sight of it made her mouth water. She looked up at him, her green eyes blazing with hunger. "Let me taste it, Ben. Please!" He nodded, a sharp, jerky motion, his hands tangling in her auburn hair. Gwen leaned forward, her full lips parting to take the head of his cock into her mouth. It was a challenge, but one she welcomed. She swirled her tongue around the tip, tasting his delicious pre-cum. She had dreamed of this for years. She then took him deeper, her jaw aching wonderfully, her entire world narrowing to the feeling of his girth filling her mouth. Ben's groans were like music to her ears. She didn't neglect his massive balls either. She used her tongue on those massive cum factories like a professional ball polisher. "Yeah... Oh fuck... Just like that!" he grunted, his hips giving a slight thrust. She worked him with a passionate, worshipful intensity, her hands coming up to cradle his heavy balls, feeling their weight, their heat. Her own arousal was off the charts. Warm juice was dripping between her thick thighs, but this was about him, about proving her devotion to him. When Ben's breathing hitched, his grip tightening in her hair, she knew he was close. She doubled her efforts, taking him as deep as she could, her throat working around him. With a roar that shook the walls, he came. Thick, hot ropes of cum shot down her throat, so much she couldn't swallow it all. It spilled from the corners of her mouth, dripping down her chin and onto her mountainous chest, painting her skin with his seed. She drank him down, milking every last drop until it stopped. As she finally let go of his cock, she looked up. Ben's expression was one of satisfaction. But he also wanted more.

"My turn now!" Ben said, his voice as confident as ever. He spun her around to face the mirror, bending her over the very bench she had just been sitting on. Her massive, sweat-slicked back was to him, her enormous ass presented like an offering. He ran a hand over the hard, round curve of her glutes, squeezing the dense muscle. "Fuck me, Ben!" she begged, her tone overflowing with lust. "Fuck me until I can't think. Until my pussy screams. Breed me!" Ben needed no further encouragement. His hands grabbed her wide hips, his fingers sinking into the dense muscle. The head of his still-hard cock pressed against her slick entrance. Gwen braced herself against the bench, her own huge muscles tensing in anticipation. With one powerful, relentless thrust, he buried himself inside her to the hilt. A scream, equal parts agony and ecstasy, tore from Gwen's throat. The feeling of being stretched, filled, claimed by him was beyond anything she'd ever imagined. It was a perfect, brutal pressure that touched her very core. Ben set a relentless pace, each thrust driving her forward, making the boobs bounce in all directions. The sounds were obscene: the slap of flesh on flesh, the creak of the tortured metal under their combined weight, their endless grunts and moans. For Gwen, it was a sensory overload. Every deep drive stimulated her hungry pussy, sending shockwaves of pleasure through her massive frame. But it was more than that. With each pounding thrust, she felt a strange, familiar warmth blooming deep within her muscles. She saw the incredible sight of her own muscular body being dominated by his. She saw the raw power in his thrusts, the blissful agony on her face. It was everything she ever wanted.

"YES! YES! GIVE ME EVERYTHING! I CAN TAKE IT! I CAN TAKE ALL OF IT!" she roared, meaning every single word. Ben felt her internal muscles clench around him with impossible, titanic strength, milking his cock like it had never been milked before. Gwen's eyes, blurred with pleasure, focused on their reflection. He fucked her with a primal intensity, his balls slapping against her throbbing clit. Her muscles, already pumped and sensitized from her workout, contracted violently with each thrust, amplifying the immense pleasure. "Gwen... I'm gonna..." Ben grunted, his rhythm becoming frantic."DO IT! CUM INSIDE ME! MAKE ME YOURS!" she screamed. Her plea shattered his control. With a final, earth-shaking thrust, he buried himself to the hilt and erupted. His release was volcanic, a torrent of potent alien-hybrid seed flooding her depths. The sensation triggered Gwen's own cataclysmic orgasm. Her body convulsed, her muscles locking in a full-body flex so intense her skin threatened to split. A geyser of her own juices sprayed from her, mixing with the sweat and cum on the floor. They stood there for a while, their massive bodies throbbing. The connection between them had visibly tightened, their relationship had evolved, and their bodies demanded more. "Gwen?" Ben asked, his cock still buried in his cousin. "Yes, Ben?" she replied quietly. "I want to put it in your ass." he said bluntly. "Please put it in my ass! I want it!" Gwen replied, grabbing her giant boobs and squeezing them hard with anticipation. With a wet, slick sound, the stud slid out of her flooded pussy, his monstrous cock glistening with their mixed fluids. Luckily for Gwen, he was already properly lubricated. She forced her massive glutes to unclench, presenting herself fully to him. With a low groan from both of them, the thick head of his cock began to breach her. It was a sharper, more intense stretch than before, a white-hot claim of territory that made Gwen's vision spark. "Fuck... yes... so... big..." she hissed, pushing back against him. He sank deeper, inch by impossible inch, until he was fully sheathed in her ass. The feeling of total, brutal fullness was otherworldly. Ben held still for a moment, letting her adjust, his hands roaming over the expansive geography of her back.

"Look!" he commanded, flexing his cock, making her flinch. Gwen's eyes focused on the mirror. The sight was obscene, but also glorious. She admired her own muscle-bound form, bent and impaled, but even more his powerful body driving into her tight ass. It was the ultimate validation. She was strong enough to take him. Ben began to move with a slow, deep, punishing rhythm. Each withdrawal was a tease, each thrust a declaration of ownership. Gwen met him thrust for thrust, her own strength making the impact seismic. The bench groaned in protest. The strength of Ben's rock-hard abdomen slamming into her backside was a sight to behold. "Harder!" she demanded, her voice ragged. "Ruin my ass! Make it yours!!" With a growl, Ben complied. His pace became brutal, his balls slapping against her soaked pussy like a wrecking ball working to demolish a building. Her ass, stretched impossibly wide, burned with both pleasure and pain that fed directly into her core. "You like that, you muscle-bound bitch? You like your cousin wrecking your ass?" Ben grunted, his movements frantic. "YES! I'M YOUR BITCH! FUCK ME HARDER!! PLEASE WRECK MY ASS!" Gwen screamed, her muscles bulging and rippling with the force of his thrusts. She reached back with one Herculean arm, grasping his hip, pulling him even deeper, like she wanted to fuse their bodies together. Her ass felt so good wrapped around his member that he couldn't take it anymore. The climax started in Gwen's core, like a supernova of sensation fed by the relentless friction in her tight ass. Her muscles began to contract uncontrollably, a chain reaction of flexing that started with her clenched ass and rolled up through her granite-hard back and into her screaming biceps and triceps. "BEN... I'M... I'M GONNA..." she moaned, salivating."DO IT!" he roared. Her orgasm then detonated. With a final, guttural shout, Ben too unleashed another torrent of seed, claiming her in a way even more primal than before. They loved every moment of their deep connection. Wave after wave of orgasmic bliss rocked their mountainous bodies as Ben's cum filled Gwen's guts and Gwen's juice splashed Ben's titanic legs. They collapsed together in a heap of sweat-slicked, trembling muscle, the bench finally giving up under their combined, impossible weight. They slid to the floor, a tangle of limbs, Ben's cock still buried inside her ass, still releasing warm cum. For a long time, the only sounds were their ragged breathing and the occasional drip of fluid onto the floor. A slow, knowing smile spread across their faces. Then they finally kissed. It lasted mere moments, but for both of them it felt like an eternity. "Ben?" she said, her voice hoarse. "Yeah, cuz?" Ben replied. "Round two?"


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[Nick563]

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