It was an averagely boring summer's day. Kendall Summers was home from college and was currently sat at home, curled up on the large couch, scrolling on her phone. It wasn't that she COULDN'T go anywhere: On the contrary, even as she sat there and scrolled, notifications pinged on a regular basis. Kendall was stunningly beautiful, and thus got a lot of attention wherever she went. But she'd decided to take it easy today. She was perfectly content to lay there in her tank top and shorts all day.

Kendall looked up as she heard someone coming down the stairs. Her brother, Wesley smiled sleepily at her. The two siblings shared the same dark hair, same height and same skin tone. But other than that, they had basically nothing in common. As they grew up, Kendall fell in love with sports, playing softball, basketball and cheerleading, all at different points. Because of this she was incredibly fit to this day, with long, smooth, muscular legs, a flat, toned stomach and a perky ass. Wesley, meanwhile, was more nerdy. He wasn't fat or anything (stupid boy metabolisms) but he wasn't nearly as in shape as Kendall was. He spent most of his time in his room, playing games, reading comics and fantasy and sci fi novels, and just generally keeping to himself. He even had glasses, where she wore contacts.

"Morning," he called over his shoulder as he turned into the kitchen.

"Morning," she called back, then quickly returned her attention to her phone. When she didn't hear him head back upstairs, she looked up to find him leaning in the doorway, water bottle in hand, watching her.

"What?" she asked.

He looked around, then asked, "You doing anything today?"

"Just this," she replied. "Why?"

He chewed his bottom lip, twisting the bottle almost......nervously.

"What???" she asked, curiosity peaked. He sighed, walking over to sit beside her.

"Okay, so here's the thing. I signed up for this online photography contest. One of the rules is you need to use a model. And I was thinking....you know....." he looked away, blushing.

"What, you want me?"

"Only if you'd want to," he added hastily.

Kendall had been approached to do some modeling in the past. She'd only actually done it once, though, with an old high school friend who'd become a professional photographer.

"What exactly would this entail?"

"Nothing crazy," he said. "Just a few outfits."

After some thought, she shrugged.

"Sure. When?"

He looked up the stairs to his room, then back down.

"I was thinking now if you're down."

She stood, languidly stretching, unknowingly giving Wesley a peak at her stomach.

"Okay! Where did you want to do this?"

"Tell you what," he said, standing up, too. "You go wait out back. I'll go grab my camera and the outfits."

She walked out into the backyard. It was decently big, with a cookout area, a pool, a picnic table with an umbrella, and a small shed where they're dad kept the lawn mower and some tools. Only moments later, Wesley came out of the sliding patio doors with his camera in one hand and some clothes draped over the other arm. She raised an eyebrow as she looked at them. She couldn't see them well, but they all looked to be sporting odd colors.

He set the clothes down in one of the beach chairs by the pool, immediately turning to fiddle with his camera. Kendall walked over, picking up the first piece. Her eyes widened slightly as she took in the spandex one-piece, styled to look like a Superman costume, with a big 'S' across the chest. The lifted it out of the way to look at the second, which was more or less the same thing, except this one was red with blue accents, with web designs all over and a spider on the chest.

"What kind og photography contest is this?" she asked. Wesley looked up, his eyes widening as he saw Kendall standing there with one of the costumes held against her.

"Oh," he said, looking away. "Well, it's, um.....it's a cosplay contest."

"Cosplay?"

"Yeah. It's.....well, it's people dressing up in costumes."

"Superhero costumes?"

"Not necessarily. Superheroes, video game characters, movie characters...." he trailed off.

She looked between her shy, bashful brother and the costume in her hands and shrugged.

"Okay, whatever."

"Oh!" he said, relief plain in his voice. "Well, you can go inside to change, and we can-"

"No need," she said, reaching down to grab the bottom of her top. Wesley turned just in time to see her take her top off and toss it onto the other beach chair.

"Whoa!" he said, turning beet red as he turned away. "S-sorry," he stammered. "I didn't mean to-"

"Oh, relax," she laughed. "It's nothing you've never seen before."

He didn't say anything, just stayed turned until she finished changing into the first costume.

"Okay," she sighed dramatically. "I'm decent again." He turned to look at her. "So?" she said, sticking her hip out. "How do I look?"

"Great!" He said.

"Thanks. So, how should I pose?"

"That's a great start," he said, raising his camera. She stood smiling with her hip stuck out sassily as he snapped a quick succession of pictures all from different angles, the sound of the shutter filling the silence.

"Okay," he said after a while. "Now try this." He stood, his feet apart, his chest puffed out, his fists on his hips. She copied him, feeling a bit ridiculous, but he said, "Yes! Fantastic!" as he jumped back into snapping. After, he had her do one more set pretending to fly.

"Okay," he said. "Let's move on. I'd like to get the three of these done while the lighting's good out here." He turned again as she changed into the Spider-Man costume. She truck various poses here, too, these taking a bit more advantage of her athleticism. Crouching carefully on the end of the pool, doing a cartwheel, he even had her do a split.

"Who's this?" She asked as she picked up the third costume. It was similar to the Spider-Man one, but this was one with black and white, with a hoodie with pink lining.

"Spider-Gwen," Wesley answered, back turned again. "She's from an alternate universe."

Kendall rolled her eyes, though she found her brother's nerdiness endearing. He instructed her to do similar poses here, though these were a little more sassy, a little girlier, a little more attitude. At one point he stopped and looked up at her bashfully. "Um.....Would-would be okay if I got, uh...." he nodded to her ass.

She smirked, turning her back to him, standing so that it became even more prominent. He didn't answer but the shutter began going off again, and Kendall felt her pulse speed up. Though she'd never even remotely thought of her brother in that way, him taking pictures of her butt gave her a naughty thrill. She, of course, knew she had a great ass. She was constantly getting compliments on it. She always wore shorts, skirts and bikini bottoms that highlighted it's plump, peachy shape. She could picture Wesley blushing, hands trembling as he snapped picture after picture of her fantastic ass.

"Okay," he said a few snaps later. She turned. "Um....thanks," he said, smiling shyly.

"No problem," she replied, smiling. "Let me know when you post them, kay?"

"Okay," he said, watching her skip into the house. She headed straight upstairs, closing her bedroom behind her, sighing as she leaned back against it.

Wesley headed straight up to his room, too. He was enveloped in darkness as he closed the door. He had black wallpaper and a blackout curtain. He walked across his messy floor to the computer, plugging the camera into it as he sat. He chewed his thumb as he went through all the pictures slowly. They'd come out even better than he could've hoped. When he'd seen that one of the Discord communities he was a part of was hosting a cosplay contest, he'd wanted to enter, even before he found out about the thousand dollar prize. The prize just made him determined to actually win. He'd immediately thought of Kendall. How all his friends always had crushes on her growing up. He knew having her as his model would guarantee him the win.

What he hadn't expected was how it would effect him. Sure, he'd always known on a logical level that Kendall was hot. His friends wouldn't shut up about it, and she'd always been among the popular crowd. But actually seeing her out there, in those costumes, posing, him taking pictures of her.....

He grunted uncomfortably, his cock still straining against his slacks. He knew it was wrong, but his cock didn't care. He sat there, hard as a rock, touching up the pictures. Highlighting her best features. In the end, he made it without caving completely. He did touch himself, just a little, to one picture in particular. It was in the Spider-Gwen set, the first of the set that focused on her butt. You could just see her confident smirk over her shoulder. It added immensely to the appeal of the shot, and it proved too much. He stared, enjoying the sensations emanating from his cock. He brought himself to the edge, over and over, never letting himself go over. Finally, he saved, closed the editing software, and went to take a cold shower.