Johnny strode into the sleek, high-tech Fantastic Four headquarters, a cocky grin plastered across his face. His uniform was singed and tattered from their latest mission, but he couldn't have cared less.
"Did you see how I took out those Doombots?" he crowed to the seemingly empty room. "I was like a human comet out there! They never stood a chance against the Human Torch!"
A soft chuckle echoed from nowhere and everywhere. Johnny's head whipped around, searching for the source. "Sue? You in here?"
"Maybe," came the teasing reply. A glass on a nearby table suddenly lifted into the air, tilting as if someone was taking a sip.
Johnny rolled his eyes. "Real mature, sis. You know I hate when you go all Invisible Woman on me." He flopped onto the couch, kicking his feet up. "Anyway, as I was saying, I was unstoppable out there. I bet even Reed would've been impressed by my moves."
There was a shimmer in the air, like heat waves rising from asphalt. Johnny's eyes widened as Sue materialized before him - completely nude. His jaw dropped and he jumped up off the couch in shock.
"S-Sue! What the hell?!" he sputtered, averting his eyes and fumbling to cover them with his hands. His face flushed crimson, all his bravado evaporating in an instant.
Sue stretched languidly, a mischievous glint in her eye. "What's the matter, little brother? I thought you were unstoppable." She sauntered closer, clearly enjoying his discomfort. "Or are you all talk?"
Johnny squirmed, trying desperately to look anywhere but at his sister's naked form. "I-I don't... this isn't... put some clothes on!"
Sue leaned in, her breath hot against his ear. "Make me," she whispered.
Johnny stumbled backwards, nearly tripping over his own feet as he tried to put some distance between himself and Sue.
"Sis, this isn't funny," he protested weakly. "What if Reed or Ben walked in? Or worse, what if there are cameras in here?"
Sue rolled her eyes, planting her hands on her hips. "Please. I disabled the security system as soon as we got back. And the others won't be back for hours." She took another step towards him, backing him against the wall. "What's really bothering you, Johnny? Afraid you might like what you see?"
Johnny squeezed his eyes shut, turning his head to the side. "That's... that's not... you're my sister!"
"Mmm, and you're my brother," Sue purred. "My strong, handsome brother who just saved the day." She ran a finger down his chest, making him shiver. "You know, this isn't really fair."
Johnny's brow furrowed in confusion. "What?"
"Well," Sue continued, "you get to see me naked, but I've never seen you naked. Doesn't seem very equal, does it?"
Before Johnny could react, she grabbed his wrist and tugged him towards her bedroom. "Come on, little brother. Time to even the score."
"Sue, wait!" Johnny stammered, tripping over his own feet as she pulled him along. Once in her room, he tried to make a break for the door, but Sue blocked his path.
"Uh uh," she tutted. "Get on the bed. And strip."
Johnny's face burned hotter than his flames ever could. He shifted awkwardly, trying to hide the obvious bulge in his uniform. "I... I can't," he mumbled.
Sue's eyes flickered downwards, a smirk playing on her lips. "Oh? Looks like someone's excited. Don't be shy, Johnny. Let me see what you're packing."
She sauntered over to the bed and sat on it, all eyes on his bulge.
He awkwardly climbed up on the bed and with trembling hands, slowly peeled off his uniform. As he pushed it past his hips, his erection sprang free, standing proudly at attention.
Sue's eyes widened in shock. "Holy shit, Johnny!" she exclaimed. "Where have you been hiding that monster? You've been holding out on me!"
She couldn’t help but stare, feeling a hot flush of arousal.
Johnny covered himself with his hands, his face beet red. "Can we please stop this now?" he pleaded.
But Sue was having none of it. She gently pried his hands away, her eyes locked on his impressive member. "Oh no," she breathed. "We're just getting started, little brother."
Sue reached out and gently wrapped her fingers around Johnny's shaft, causing him to gasp. She began to stroke him slowly, marveling at how hot and hard he felt in her hand.
"Wow, you really are the Human Torch," she teased. "Try not to burn me, yeah?"
Johnny closed his eyes and bit his lip, trying to stifle a moan. Despite his embarrassment, his body was responding eagerly to Sue's touch.
Sue leaned in close, her breath hot against his sensitive skin. She planted soft kisses along his length before taking him into her mouth. Johnny cried out in pleasure as she began to suck, her tongue swirling around his tip.
"Oh god, Sue," he groaned. "That feels… sooo good."
Sue hummed in agreement, sending vibrations through his cock. She took him deeper, relaxing her throat to accommodate his impressive size. Johnny tangled his fingers in her hair, all his reservations melting away in the heat of the moment.
Just as he felt himself approaching the edge, Sue pulled away with a wet pop. Johnny whimpered at the loss of contact.
"Not yet, little brother," Sue scolded playfully. "I'm not done with you."
She lay back on the bed, spreading her legs to reveal her glistening center. Johnny's mouth went dry at the sight.
"Come here," Sue beckoned.
As if in a trance, Johnny positioned himself between her thighs. He hesitated for just a moment before slowly pushing inside her welcoming heat. They both moaned as he bottomed out.
"Oh fuck, Johnny," Sue gasped. "You feel so good inside me."
Johnny began to move, settling into a steady rhythm. Sue wrapped her legs around his waist, urging him deeper. Their bodies moved together in perfect synchronicity, years of fighting side-by-side translating into an innate understanding of each other's needs.
As their pleasure built, Johnny's thrusts became more erratic. Sue could feel herself approaching the precipice.
"Johnny, I'm close," she panted. "Come with me."
With a few final, powerful thrusts, they tumbled over the edge together. Johnny buried his face in Sue's neck as waves of ecstasy washed over them both.
As they came down from their high, Johnny rolled off to the side, a dazed expression on his face. Sue propped herself up on one elbow, grinning at him.
"So," she said. "Still think you're unstoppable?"
Johnny let out a breathless laugh. "Okay, you got me. You win."
Sue leaned in and kissed him softly. "We both won, little brother."
As they lay there catching their breath, Johnny suddenly sat bolt upright. "Oh shit," he exclaimed. "What if Reed finds out?"
Sue laughed at Johnny's panicked expression. "Relax, little brother. Reed's too wrapped up in his experiments to notice anything beyond his lab. And Ben? Well, let's just say he's got his own rocky love life to worry about."
She stretched, her naked body gleaming in the soft light. Johnny couldn't help but stare, still amazed by what had just transpired between them. Sue caught his gaze and winked.
"Like what you see?" she teased.
Johnny blushed but didn't look away this time. "You know I do," he admitted. "But... what happens now?"
Sue sat up, running her fingers through her tousled hair. "Now? Now we have some fun." She grinned mischievously. "You know, I've always wondered what it would be like to make love while invisible."
Before Johnny could react, Sue shimmered and vanished from sight. He felt the bed shift as she moved, then gasped as invisible hands caressed his chest.
"Sue?" he called out, his voice husky with renewed arousal.
"Right here," she whispered in his ear. He shivered as he felt her breath on his skin but couldn't see her.
Invisible lips pressed against his, soft and warm. Johnny closed his eyes, losing himself in the sensation. He reached out, his hands finding Sue's curves even though his eyes saw nothing.
As they kissed, Johnny felt himself hardening again. Sue must have noticed too, because suddenly he felt a warm, wet heat engulf him. He moaned as Sue's invisible mouth worked its magic on his cock.
"Oh god, Sue," he groaned. "This is incredible."
He heard her giggle, the sound muffled around his length. The sight of his cock disappearing into thin air as Sue took him deeper was surreal and intensely arousing.
Just as he was nearing his peak, Sue pulled away. Johnny whimpered at the loss of contact, but then felt the bed shift again as Sue straddled him.
"Ready for round two?" she asked, her voice husky with desire.
"God, yes," Johnny breathed.
He felt Sue sink down onto him, enveloping him in her tight heat. It was a strange and exhilarating sensation - he could feel every inch of her around him, but his eyes saw only empty space above him.
Sue began to ride him, setting a steady pace. Johnny's hands found her hips, guiding her movements. He marveled at the feeling of her smooth skin beneath his palms, even as his eyes told him there was nothing there.
As their pleasure built, Sue became visible again, shimmering into existence above him. They locked eyes as she cried out.
"Johnny," she moaned. "Oh god, Johnny!"
Hearing his name on her lips pushed him over the edge. With a cry of pleasure, Johnny came hard, feeling his sister’s pussy pulsating around him.
As they came down from their shared climax, Sue collapsed onto Johnny's chest, both of them panting heavily. Johnny wrapped his arms around her, marveling at the softness of her skin and the way their bodies fit together so perfectly.
They lay there in comfortable silence for a while, basking in the afterglow. Johnny absently stroked Sue's hair, still slightly damp with sweat. He could feel her heartbeat gradually slowing to match his own.
"That was..." Johnny began, struggling to find the right words.
"Amazing? Mind-blowing? Earth-shattering?" Sue supplied with a grin.
Johnny chuckled. "All of the above."
Sue propped herself up on her elbows, looking down at him with a mix of affection and mischief in her eyes. "You know, for someone who was so reluctant at first, you sure got into it."
Johnny felt his face flush. "Yeah, well... it's kind of hard to resist when you've got a naked invisible woman coming onto you."
Sue laughed, a bright, melodious sound that made Johnny's heart skip a beat. "I'll have to remember that trick for next time."
"Next time?" Johnny raised an eyebrow.
Sue leaned in close, her lips brushing against his ear. "Oh yes, little brother. There will definitely be a next time."
With that, she rolled off him and stretched languidly. Johnny admired the curves of her body, still amazed that he was allowed to look, to touch.
"Come on," Sue said, standing up and holding out her hand. "We should probably clean up before the others get back."
Johnny took her hand, letting her pull him to his feet.
In the shower, they took turns washing each other, their touches alternating between playful and sensual. Johnny loved how natural it felt, how easily they had slipped into this new dynamic.
As Sue shampooed his hair, massaging his scalp with her fingers, Johnny closed his eyes and leaned into her touch. "This is nice," he murmured.
"Mmm," Sue agreed. "You know, I've always wanted to do this."
Johnny's eyes flew open. "Really?"
Sue nodded, a soft smile on her face. "I've always felt protective of you, Johnny. But lately... I don't know. Something changed. I started seeing you differently."
Johnny turned to face her, suds running down his face. "I know what you mean. It's like... one day you were just my bossy big sister, and the next..."
"I was your hot, naked sister throwing herself at you?" Sue finished with a smirk.
Johnny laughed, pulling her close. "Something like that, yeah."
Sue smiled at him, and said, “Well, at least we don’t need to worry. They’ll never guess.”
“Why’s that?”
She punched him in the arm, “Cuz we’re brother and sister and that would be GROSS,” and with that, she gave him a quick kiss and disappeared.
He watched the shower door open, a towel float upwards and wrap itself in a circle, before drifting out of the bathroom, and then a click, as Sue turned off the light, leaving him in total darkness.
“Suuue!!!”
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