Original Sin (Taboo Erotica)

Original Sin

Madison Laine

Copyright 2014 Madison Laine

Greg tried not to show his embarrassment as the familiar swelling took hold in his pants. He pulled the college textbook over his lap to hide the growing bulge that he knew would be showing, but as soon as his stepsister’s back was turned his eyes lifted from the pages.

The fair skin on the back of her thighs grabbed his attention and he wondered if she knew just the effect she had on him as she walked around in the short nightdress. As Carla bent forward to pick up
a magazine from the floor beside an armchair, the hem of her skirt slid higher on her thighs to the point that she was almost revealing her panties.

“Foun
d it,” she said as she straightened up again and turned.

Greg quickly brought his gaze back to his book and only looked up when Carla
said the same words again.

“You and your magazines,” he teased her.

“What?” she complained with a grin. “I like reading about the celebs.”

“Yeah…,”
Greg continued to tease. “I notice you always choose the magazines with the pictures of male celebrities in their swimming trunks.”

The grin on Carla’s face grew
wider and she shrugged her shoulders. “So what,” she said as she walked to the door of the lounge. “It’s not like you don’t look at girls.”

The embarrassment spread through Greg as his stepsis
ter walked out of the room and he wondered if she knew he’d been looking at her as more than just a sister. He did feel a little weird about it to be honest, but it didn’t stop him. They’d known each other since they were around four years old when his mother and her father got married. It meant they grew up together as brother and sister, but since they turned eighteen he couldn’t help looking at her as more than that.

The blossoming of her body had brought on those thoughts. Carla was
still prone to walking around the house in the skimpy nightgowns and clothes she’d always worn, but her curves filled them out with a much sexier look now and Greg couldn’t stop himself looking. The fantasies that occasionally ripped through his mind were dirty and he knew that it wasn’t the way he should be thinking about his stepsister, but when his erection swelled in his pants there was no stopping them.

It had happened again as he stared at Carla’s thighs and he shifted uncomfortably in his seat and waited for his lust to pass before he pulled the book from his lap and started to read it in earnest again.
Thirty minutes later he looked up as he heard a noise and saw that it was his mother that stepped in the room this time.

“Still studying?” she asked.

“Yeah,” he answered. “I have some coursework to hand in on Monday.”

His mother laughed. “It’s Friday night Greg,” she went on in a teasing tone. “You have all weekend to get your coursework finished.”

“I guess,” he said as he smiled. “Maybe I will call it a night and get some sleep.”

“
Remember, we will be away tomorrow night,” his mother said when he stood.

“I remember,” he said as he gathered up his books and walked to the door of the lounge.

There wasn’t much chance of him forgetting. The thought of being left alone for the night with his stepsister made him both nervous and excited. Carla had never shown the slightest interest in him as more than a brother, but that didn’t stop the fantasies playing out of taking advantage of the pretty curves that were now so obvious under her clothes.

He shook his head as they threatened to take hold again and tried to concentrate on what he still needed to do for his coursework. It worked to an extent, but as he lay in bed
after showering and getting changed the sight of Carla’s nightdress sliding up her thighs was on his mind again until he drifted off to sleep.

He got another sight of his stepsister’s pretty legs when she came down to breakfast the next morning
wearing the same nightdress. With their parents in the kitchen though, he made the effort not to try and steal glances.

“So what have you two got planned for today
?” his mother asked.

“
Going to meet friends,” Carla managed to get out as she spooned muesli into her mouth.

Greg shrugged his shoulders as his mother looked at him. “Coursework to finish and then I might go out.”

“Well, we are heading off around six,” his mother went on. “So be back before that.”

They both agreed they would and Greg waited for his stepsister to finish
her breakfast before he made a move. He let her walk out of the kitchen first and checked to make sure their parents weren’t following before hurrying after her. He caught up just as she started to walk up the stairs and let her get just enough ahead so that he could almost see up the short nightdress to panties. His eyes remained glued to the pretty sight of naked thighs all the way up the stairs.

“See you later,” Carla said as she walked in her room.

“Sure,” Greg agreed.

He finished his coursework in a hurry and arranged
to meet a friend afterwards. He was back at the house by four, but it was almost six by the time Carla showed up.

“All set?” the eighteen year old girl asked her parents with a grin
when she walked through the door.

“You’re just in time,” her
stepmother said with a mock disapproving tone.

“Just in time is good enough,” Carla teased and giggled as she ducked the swipe of
a hand that was aimed at her head.

“You two behave now,”
her father threatened. “We don’t want to get back and hear about parties from the neighbors.”

Carla giggled again. “Relax,” she went on teasing. “We’ve on
ly invited twenty friends over so it shouldn’t get too crazy.”

Her father shook his head as he
walked to the car. “No friends,” he shouted over his shoulder as he got in the driver seat and pointed at his children through the windshield before starting the vehicle.

“Did you invite anyone over?” Greg asked as they watched the car disappear from view.

Carla shook her head as they turned to walk in the door.

“Just you and me for the evening brother,” she said. “Maybe we sh
ould try some of mom and dad’s wine now that they are gone.”

“What?” Greg asked as he followed.

Carla’s giggle sounded out again. “C’mon,” she urged. “Don’t you want to try?”

“I guess,” he said and kept following as his stepsister
walked to the kitchen. “Do you think they will notice?” he asked as he watched Carla open a cabinet and search through the bottles of wine.

“Na,” she replied. “I did it once before and they never said anything.
They always seem to keep this cabinet well stocked, but I don’t think they keep track of exactly what they have.”

“When did you try wine?” Greg asked.

“That would be telling,” Carla said with a laugh. She pulled a bottle of white wine from the cabinet and went to get a corkscrew. “Go and get some glasses,” she went on as she opened the bottle.

Greg moved to another cabinet and opened it to pull out a couple of plastic tumblers.

“Classy,” Carla teased him when she saw the tumblers, but was quick to pour the wine.

She grabbed one of the tumblers
to take a drink, then walked out of the kitchen carrying it and the bottle. Greg moved after her and they stepped into the lounge.

“See if there is a movie on,” Carla said as she dropped on the sofa.

Greg saw that her skirt had hiked up her thighs and couldn’t help stealing a glance. He moved to sit on an armchair where he could get a view of his stepsister’s legs and grabbed the remote control. He flicked through to a movie channel and put the remote down.

Carla’s attention focused on the
screen and she didn’t catch her stepbrother’s glances towards her legs. When her tumbler was empty she was quick to fill it again and Greg moved across to her to have his tumbler filled up also.

They continued to watch the movie, but twenty minutes later Carla was getting bored with it and she
leaned over the side of the sofa to get one of her magazines.

“Are the men in the movie not good looki
ng enough for you?” Greg teased her when he saw her opening it.

“I prefer looking at the celebs in their swimming trunks,” she shot back at him as she remembered his comment from the night before. She let out a slight giggle before she went on. “I like to see just how big their bulges are.”

The breath caught in Greg’s throat at the words. He’d been trying to fight off the stiffening of his cock as he sneaked glances at Carla’s legs, but her cheeky words brought on a hot rush of blood that was unstoppable.

“Dirty girl,” he teased his stepsister and waited to see what the response was.

The grin spread across Carla’s face. “I do dirtier things than just look at bulges,” she confessed as the effects of the alcohol lowered her inhibitions.

Greg tried to control his breathing and he shifted
uncomfortably in his seat as his erection started to strain against the confines of his pants.

“
What exactly do you do?” he asked and hoped that Carla would reveal more. He wasn’t disappointed.

“On the internet,” his stepsister
admitted. “You can see a whole lot more than bulges on there.”

“Fuck,” Greg let out under his breath then raised his voice. “What do you look at?”

A flush of redness spread across Carla’s cheeks, but her obvious embarrassment didn’t stop her going on and her voice was quiet.

“You know…,” she said. “At naked guys when they are
turned on.”

“Do…, do you like what you see?” Greg asked.

Carla rested her head on the back of the sofa and closed her eyes.

“Oh yeah,” she confessed
quietly and a little smile played on her lips. “It sends my fantasies running wild when I see just how…, you know…, just how big and solid they get.”

Greg hesitated, but knew he had to ask. “Have you ever…”

“…seen one in real life?” Carla finished in a rush and opened her eyes to look at stepbrother. She shook her head. “No,” she went on, “Not yet. I’m still a little virgin girl.”

Their eyes locked and Greg could
sense his heart pounding at what he was hearing. He watched as Carla sat up again and knew that he was going to get what he wanted. There was no doubt what was happening was his stepsister’s fantasy even more than it was his and he saw her gaze drop briefly to his crotch and come back up to his face. Her mouth opened slightly and the tip of her tongue darted out to wet her lips.

“Do…, do you want to see?” Greg asked slowly.

Carla nodded her head and in an instant crossed the distance between them. She pushed her stepbrother’s knees apart so that she could drop down to the floor between them and he almost jumped as her hand touched his thigh.

“Are you hard?” she asked.

“Yes,” he confessed. “It happens a lot around you these days.”

“Fuck…,” Carla breathed out quietly.
“Show me.”

A shiver rippled through her as she watched Greg drop his hand to the zipper of his pants. Looking at the pictures on the internet always got her wet, but she’d never felt as excited as she did right at that moment. She stroked her fingertips on her stepbrother’s thigh as she watched him lower the zipper.
The moment stretched out as he slipped his hand through the open gap and wriggled in the seat as he worked fingers under his boxer shorts.

As his hand came back out Carla let out a gasp as she saw the slick head of his cock. As Greg continued to wriggle in the seat he pulled his erection completely out and she got her first real look at it as he pulled his hand away. The thick veins bulged out along its length as the rush of hot blood
stiffened the flesh to make it throb. She looked up at her stepbrother.

“Is…, is this weird?” she asked.

“Definitely,” he replied and reaching for her hand dragged it to his cock.

Carla shivered as her fingertips touched on the hardness. The boy that had been her brother for around 14 years was now so much more. Her hand trembled as she traced the line of a vein and the fact that she was making a real live cock twitch as she touched it sent her exhilaration
climbing. The head was already slippery with pre-cum as she teased her fingers on it and she looked up as Greg moaned.

“
Is that good?” she asked as she rubbed her fingertips on the slickness.

“Yes,” he replied in a strained voice.

“Do you jack off a lot?” she went on.

Greg nodded his head and Carla giggled as she brought her gaze back down to his cock. She worked her fingers around it and held her breath as she squeezed to feel just how
thick and solid her stepbrother got. Knowing that it was because of her made it all the more of a turn on.