Amber stood in front of the full-length mirror, tugging at the high-cut leg line of her deep purple leotard. "Seriously, how do they fight in this stuff?" she asked, one eyebrow arched. "It's like a swimsuit from space."
Liam didn't look up from adjusting the softbox light. "It's not just a leotard. It's a classic design. Psylocke wore that in her '90s run—Jim Lee era. Very iconic."
Amber turned, the black sash swishing around her waist. "Iconic for wedgies, maybe."
He sighed. "It's part of the aesthetic. Streamlined. Ninja-chic. And the leg wraps? Tactical."
She snorted, lifting her booted foot to examine the blue ribbon-like straps that crisscrossed her thigh. "Tactical ribbons. Right."
Amber struck a pose, admiring her ass in the mirror. As silly as the costume was, she had to admit it looked damn good. She posed a few more times, twisting her body just enough to emphasize the curve of her breasts under the tight material. She caught Liam staring, his eyes lingering on her ass. He looked up, their eyes meeting in the mirror. His face flushed, and he quickly turned his attention back to his lighting.
"Well… even if this outfit is one big purple wedgie, I know this set's gonna blow up online."
Liam let out a short laugh, finally standing upright from behind the tripod. "Yeah. Nerds love Psylocke."
She pointed a gloved finger at him. "See? That's why I keep you around." Her eyes briefly flickered to his crotch, then back to his face.
Amber and Liam weren't exactly the sibling duo people expected. She was sharp-tongued, attention-loving, with a following online that had started as a joke and turned into a side hustle. Cosplay modeling, photoshoots, brand collabs. It paid more than any other part-time job, and she enjoyed it. The attention. The control.
Liam wasn't the stereotypical 'nerd' she made him out to be. Sure, he knew a ton about comics, games, and anime, but so did most people these days. It was his interest in photography that made the pair work. Amber knew he was talented, her pictures always turned out stunning, no matter what costume or prop or ridiculous pose she pulled.
Amber had started dragging him into her cosplay stuff six months ago. First it was, "Hey, what does this character wear?" Then it was, "What kind of poses would people expect?" Eventually, it became, "Grab your camera, I got a new set to make."
She always said she was just in it for the internet clout. That she didn't care about the characters, just the followers, the sponsorships, the likes. But she never skipped a shoot. Never half-assed a costume. Never once posted a set without checking with Liam first.
Amber had done dozens of cosplays by now. Most were tight, bright, and barely covered her thighs. Superheroes were her bread and butter. Power Girl, Wonder Woman, Spider-Girl, Black Cat. A handful of anime girls too, half of which she couldn't even name. She'd just hand Liam her phone and say, "Is this one hot?" If he nodded, she'd say, "Cool. Add it to the list."
It was Liam who knew what fans liked. What poses matched which characters. Which props were essential. He'd done the research on what made a shoot pop, a subtle nod to a comic panel here, a recognizable pose there, and Amber soaked up the attention like sun on skin. It was a symbiotic relationship.
She started it all on a whim, trying on a Harley Quinn costume one Halloween and taking a few sultry selfies. Her views tripled overnight. That weekend, she shoved her phone under Liam's nose and said, "Okay, you're my creative director now."
"Uh, what?" he asked, startled.
"You know all this comic book crap," she said, already grabbing his arm. "Also, you're free labor."
She was bossy, commanding but never ungrateful. After every shoot, she always found a way to thank him. Sometimes it was cash from website profits, sometimes it was ordering his favorite meal and letting him choose the movie, no commentary. And sometimes it was letting him admire her cosplay up close and personal, while she did things to his body that no sister should ever do to her brother.
Liam didn't seem to mind. He didn't do it for the money, or the food.
Watching Amber become these characters, slip into their skins and expressions, made them feel real in a way a comic panel never could. She brought a sort of unapologetic confidence to every shoot. He wasn't committing acts of incestuous lust with his sister, he was getting intimate with a sexy superhero. A powerful, confident woman who would do whatever she wanted.
Like now, watching her crouch into a low stance with her katana, the long ribbon-like sash flowing out from her waist, her face set in a sultry scowl that somehow still looked dangerous, Liam couldn't help but admire his sister. The costume fit her perfectly, accentuating her curves and drawing attention to the parts of her body she loved showing off.
His cock was hard. He had been since Amber had walked in the room in that tight, skin-tight purple leotard.
"You ready?" he asked, camera in hand.
Amber looked up, hair glinting purple under the light. "Always."
The photos went well. They always did. Liam would snap away, telling Amber how to pose, where to turn, the perfect angle to tilt her head. He didn't have to give many directions; she was a natural. Her smile was a weapon, her body a tool. Liam's eyes lingered on her cleavage, her lips, her ass. His erection only grew, tenting the front of his jeans.
"How we doing, bro?" Amber asked, stretching her arms above her head, pushing out her chest.
Liam snapped a picture. "We're good. You've got a great look."
"Of course I do," she replied, smirking.
She was in her element, in charge, but Liam couldn't ignore the way her gaze flickered to the bulge in his jeans, nor could he deny how much he wanted her attention.
"How do you want me next?"
"Just... just turn a bit," he stuttered, trying to angle his lower half away from the camera.
"Oooh, nice!" she cooed, running her hand along her curves. "This one's gonna get so many hits."
"I bet."
Liam was getting breathless, his pants uncomfortably tight. Amber's ass ate up the leotard's material, the thin, tight material leaving little to the imagination. She'd worn leotard costumes before, he had fond memories of Amber's Power Girl costume, and the fantastic titjob she'd given him after a successful shoot, but this was different.
Amber laid on her back, legs spread, the blade of her sword tastefully blocking the view between her thighs. She smirked, looking straight at Liam. Outside the camera, from Liam's point of view, he could see everything. The thin purple material was stretched to its limit, the outline of her pussy visible beneath.
"Fuck... you look good," he muttered.
"Don't get distracted," she warned, wagging a gloved finger. She rolled over, pushing her ass up towards the camera.
"That's... good," Liam said, his voice strained.
He snapped a few pictures, his gaze constantly drifting between her eyes and her ass. Amber had a nice butt, and it was especially highlighted in tight costumes like this. It wasn't flat, or bony, but a round, supple handful, perfect for squeezing. He felt his cock throb at the memory of her soft cheeks wrapping around his girth.
When Amber dressed up as Spider-Woman, he remembered how the costume's spandex clung to her ass, like a second skin. His cock slid between her cheeks, the slippery fabric letting him slide up and down the crack of her ass. He barely needed to thrust, her ass bouncing against him until his cum splattered across the small of her back.
Now her ass had even less to cover it, and Liam couldn't help but stare. He wanted her. Not just the cosplay, but his sister. His beautiful, confident, cock-teasing sister.
"Hey, perv. Eyes up here."
Liam shook his head. "S-sorry."
She smirked, sitting up and crossing her legs. "Nah, it's fine. I don't blame you. This outfit looks fuckin' great on me."
"It does," he said.
"Careful… I can read your mind," she teased, putting on an accent. "And you're not being subtle."
Liam looked down. The front of his jeans was a massive tent, the fabric straining against his erection. He looked up. Amber was crawling towards him, a dangerous smile on her lips.
"I don't need to touch you to get inside your head…" She leaned in, her hand running up his leg. "But I might anyway."
He was powerless to stop her.
Amber's hands worked their magic, her fingers deftly undoing the button and zipper on his jeans. Her touch sent shivers through his body, and she had barely touched him.
"So... what is it this time?" she asked, pulling his cock free. She gave it a few tugs, his shaft warm and hard in her grip. "What, depraved fantasy, did you want to Psylocke to fulfill?"
She leaned in, her face close to his. Liam shuddered as her breath washed over him, the soft leather of her gloves pleasurably smooth against his dick.
"Hmm?" she prodded, jerking him faster.
"A-ass..." Liam shuddered. "Your ass."
"My ass?" She arched an eyebrow.
He nodded, biting his lip.
"Did my, tight purple suit," she tugged his shaft, her thumb flicking over his tip. "Make you want my ass?"
"Y-yes..."
She let go of his dick and turned around, her back to him, her ass in his face. She leaned forward, spreading her knees apart and sticking her butt out.
"Fine then," she glanced back over her shoulder, her Psylocke accent heavy with lust. "Try to keep up."
Liam wasted no time. He grabbed her hips and buried his cock in between her ass, his erection slipping against her warm cheeks. Amber moaned, feeling his shaft grind against her ass, her own arousal growing.
It didn't matter that they were related. It didn't matter that Amber had a boyfriend, or that Liam had never so much as kissed a girl before the modeling began. Liam wasn't grinding against his sister, he was fucking Psylocke. Just like how did didn't facefuck Amber last week, he was using Ellen from Zenless Zone Zero. It was easy. A little lie to tell yourself, just to justify the things you really wanted.
Eventually, grinding his dick between her ass cheeks wasn't enough. Liam needed more.
Amber gasped, feeling him tug her leotard aside, exposing her wet, naked cunt. He ran his shaft along her slit, feeling her lips part and her entrance drip with anticipation.
"F-fuck..." she groaned.
Liam slid inside her, her pussy wrapping around his cock. He groaned, the sensation of his sister's tight, hot cunt enveloping him sending jolts of pleasure up his spine. She felt so good, better than anything.
Amber moaned, her ass pressing against his crotch. "F-fuck, bro..."
A sharp tug pulled on her hair, forcing her head back. Amber yelped, her neck exposed, her skin breaking into goosebumps.
"Not 'bro'," Liam said, his voice a hoarse growl. "We're not related, Psylocke."
He tugged her hair again. She winced.
"R-right," she gasped, her pussy clenching around him.
This was the real glue that held them together. This was what made her come back. The thrill of the taboo, the secret, forbidden desires that no one could know about. A whole knew side to Liam she had never seen before. So strong. So assertive. It made her melt, made her wet, and the roleplaying just added another layer of pleasure to their secret, incestuous fucking.
Liam had a dream to not only fuck every fictional girl he'd ever imagined, but to impregnate his favourite heroines. And Amber knew that one day, that dream might come true.
For now, though, he fucked her hard, his hands gripping her hips and ass. Their moans filled the room, his balls slapping against her thighs, his cock spearing her to the hilt. Reaching deeper and fucking her harder than her boyfriend ever could.
Liam grunted, his fingers digging into her hips. "F-fuck..."
He could feel his climax rising, her tight, wet walls massaging his shaft. Amber felt him throb, and pushed her hips back, her pussy taking him as deep as she could.
"S-so close..." he grunted.
"F-fuck, do it," she growled.
His balls tightened, his cock throbbing and pumping her full of hot, sticky cum. Amber cried out, her own orgasm washing over her, the pleasure heightened by the feeling of Liam's thick load flooding her pussy. She came hard, her thighs shaking, her knees wobbling, her vision blurring.
"Oh... f-fuck..."
She fell forward, landing on her hands. She looked back, panting, sweat glistening on her forehead. Liam's cock slipped from her pussy, a long string of cum stretching from her swollen cunt to his tip.
"Fuck, dude," she panted, watching the seed drip from her pussy. "You got me so full..."
"Yeah..."
Liam stood over her, admiring his work. She looked good. The outfit was perfect.
"One last photo?" he asked, raising his camera for his favourite tradition.
"Fuck, you know it."
She smiled, pushing her hair back, and crawling towards him, her tongue running across her lips. Even after all the cum he'd already shot inside her, Liam's cock still had just enough to coat her face in a sticky, white layer.
Amber kissed and sucked the length of his dick, as if trying to squeeze the last drops out. Liam took a picture. He had dozens of similar photos by now, his sister's smiling face coated in cum, some shots closer up, others zoomed out, showing off her entire body. It was always a good sign of a successful set.
"Perfect," he said, snapping one final shot.
Amber looked up at him, her cheeks glistening with cum. "I think we can call it a day."
Liam grinned, and tucked his cock back into his pants. "I'll go order the food. The usual?"
"Hell yeah."
While Liam left to place their usual post-shoot takeout order, Amber changed back into her regular clothes. She'd have to wash her costume soon, the leotard had a few dark stains from her brother's load, but it could wait for now.