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