When Mark Robbins got home from his university classes and saw his mother sitting in the livingroom he could immediately tell from the look on her face that something was wrong. When he asked she began crying, but soon explained.
"Karen called. It's Rob -- that bastard. She caught him cheating on her and she's left him." his mother said "She's with a friend now, but she's catching a plane here tomorrow. She doesn't know what she's going to do, and wants to stay with us to clear her head a while."
Mark sat down next to his mother on the couch to collect his thoughts while he digested the news. When his sister got married three years previously her mother tried to dissuade her because she had never liked Rob, but Karen was 21 at the time and old enough to make up her own mind she reminded her mother. It had been close to a year since Mark had seen his sister since she and Rob had moved, and although he wished her visit was under happier circumstances, he was glad they'd be able to spend time together nonetheless. Although Karen was 3 years older than Mark they had been close growing up and she was always a little protective of her younger brother.
"Mark, would you do me a favour and tidy Karen's old room up some and make the bed for me, please. I really need some time to myself." his mother said as she dried her eyes.
"Sure, Mom, no problem." Mark said with a smile and dashed upstairs to what was Karen's room until she moved in with Rob.
A wave of memories swept over Mark as he walked into his sister's old bedroom. He remembered how as a teenager he used to sneak into Karen's room when she was out and snoop through her belongings, and occasionally even sniff panties he'd find lying on the floor. His room was next to her's and often she would leave her door ajar and he would catch a glimpse of her changing mornings he walked by. If Karen realized this she never let on, but Mark always wondered if she enjoyed teasing him. Karen was a skinny young girl, but by the time she was a teenager she'd developed into a very pretty young woman. Mark noticed these changes in her, especially how seemingly within a year her breasts had grown noticably larger. One afternoon when he was in her room while he was out he took one of her bras from a drawer to check the tag... 'C' the label read, and Mark wished he could feel his sister's breasts, even just once. That opportunity never happened, but many times Mark was able to catch glimpses of them as Karen bent over. Occasionally she'd smile up at him while he stared, but he always nervously looked away, or began talking about something in hopes she wouldn't get mad at him.
Once Mark had finished making his sister's bed and tidied the room some he went into his bederoom and laid down. From almost the moment he'd walked into Karen's room he'd felt his cock hardening, and he laid down on his bed and unzipped his jeans to take it out and stroke it. It had been nearly a month since he and his girlfriend, Shelly, had broken up, and in that time his hand was his only source of relief when he became turned-on. Lately this had become more frequent, and Mark knew that having Karen at home again was going to increase this. As Mark stroked his cock he pictured his sister... her dark brown eyes meeting his as he stared at her bending over in a loose fitting tanktop. Karen's breasts were the largest he'd seen, or almost seen, and whenever she was around him his eyes gravitated to them. So much that he often had to force himself to look at her face when she was talking to him. But her face looked great too. Her high cheekbones were framed by her long brown hair, and her full lips made her smile nearly breathtaking at times.
Mark had a restless sleep that night, filled with dreams of his sister, and images of her standing naked before him showing off for him. The next morning he awoke early and slipped his hands under the sheets to stroke his already hard cock. Mark had been in the habit of sleeping naked for years now, and often woke up hard, but this morning he was especially horny because of the visions of his sister. A sharp knock at the door started Mark and he heard his mother calling to him.
"You'd better get up, Mark. We have to pick Karen up at the airport at ten." she said.
Mark responded that he was getting up, then quickly hauled on a pair of boxers and headed to the bathroom to have a quick shower. Shortly after he was dressed he and his mother left to be on time for Karen's arrival at the airport.
Mark caught sight of his sister immediately as she passed through the Arrivals gate and called to her. He felt his heart race as he watched Karen walking towards him and their mother. Her long brown hair was pulled back in a ponytail and moved as she walked. She was wearing a tight t-shirt and short skirt and Marks's eyes moved up and down her body as she got closer. Her breasts bounced with her movements and Mark felt his cock growing in his jeans as he stared at them. He watched as she gave her mother a long hug, then she turned to Mark with her arms outstretched. "It's good to see you again, little brother. Give me a hug." she said as she pulled Mark tight against her. Mark could smell his sister's perfume as she rested her chin on his shoulder and he inhaled sharply, drawing in her scent. He also felt her firm round breasts pressing into his chest as his hand slid up her back, over her bra strap to her shoulders. He felt his cock getting even harder as his sister pressed herself against him and he tried to ease away from her, but she held onto him tighter, pressing her thigh against the bulge in his jeans. She must be able to tell I'm hard Mark thought to himself and felt his face flush. Finally Karen broke their embrace and looked him up and down as she clutched his hands.
"You're looking good, little brother. I'm happy to see you too." she said with a grin.
"You can stop calling me little brother, Karen. I'm twenty-one now." Mark said, as he pondered his sister's comment.
Karen laughed and pinched his cheek. "Even when you're an old man you'll still be my little brother." she said as she leaned towards him and kissed his cheek softly.
The trio went to the baggage claim section to retrieve Karen's luggage and Mark helped Karen carry her bags to the car and they left for their home. While Mark drove he barely listened to the conversation between his mother and sister. His mind was preoccupied with thoughts of Karen's body against his when they met at the airport, and fears that she could tell he was hard. He glanced up at the rearview mirror to look at his sister in the backseat of the car and noticed that she was sitting with her legs apart and her skirt had ridden up so he could clearly see the insides of her thighs. Mark shifted in his seat and kept alternating his eyes between the road ahead of him and his sister in the back seat. As Mark looked in the mirror a while later he saw Karen's eyes meet his and she smiled at him. But it was a different smile than she'd given him at the airport. Her skirt was now further up her thighs, and her right hand was slowly moving up and down the inside of her right leg.
"So how are things going with you and Shelly?" Karen asked.
"Ummm... we broke up a while ago." Mark said slowly as he stared straight ahead.
"Oh, I'm sorry to hear that. But I'm sure there are plenty of girls in this town who'd wanna hook up with ya though." Karen said with a giggle.
"Karen!" her mother interjected in shock.
Mark laughed and said nothing.
"Oh, c'mon, Mom. Mark's a hottie. Look at him!" Karen said.
"Karen, I can't believe you're talking like that about your own brother!" her mother said in surprise as she turned back to face her.
"Oh, chill-out, mom. I'm just being objective here, and looking at him as a guy and not my brother. Mark, if I weren't your sister, what would you think of me?" she said.
Mark felt his palms getting sweaty and he clutched the steering wheel harder and cleared his throat. "Ah, geez, I dunno, Karen. I've never thought about it before." he said.
"Chicken shit!" Karen said with a laugh and grinned.
Mark kept silent most of the rest of the way home and drove faster than normal because he was anxious to avoid any more embarassing conversations with his sister. When they arrived at their house Mark retrieved his sister's luggage from the trunk and brought it into the house. Karen followed him with her carry-on and stood next to him smiling.
"So, you going to be a gentleman and carry my bags upstairs for me?" she asked.
"Of course." Mark said smiling and followed his sister upstairs, staring at her ass and legs the whole time.
Mark sat Karen's bags down in the middle of her bedroom and watched as she tossed her shoulder bag on the bed, then flopped down beside it. She stretched out and gave a contented sigh. Mark felt his cock hardening again as his sister arched her back so her breasts jutted towards the ceiling, then bent one leg so her foot was flat on the bed. Karen's skirt slid up her thigh as she bent her leg, and Mark saw her nipples straining against her t-shirt. Karen opened her eyes and smiled up at her brother.
"You never answered my question in the car, ya know." she said.
"What question?" Mark said, suddenly feeling nervous and wondering if she noticed the bulge in his jeans.
Karen sat up and leaned back on her elbows and Mark forced himself not to stare at her breasts.
"If I wasn't your sister, would you find me attractive?" she asked.
"Ya, sure, I guess. You're pretty, Karen." he said, as he stared at the floor.
Karen's face lit up and she gave her brother a wide smile. "Really?! You think I'm pretty?" she asked.
"Ya." Mark said, feeling less nervous after his sister's positive reaction to his admission.
"Thanks, Mark. That means a lot to me! Ever since I found out that Rob was fucking his secretary I've felt like a hag. I wondered if I was just unattractive, and that's why he turned to her." she said in a solem voice.
Mark let out a laugh and looked down at his sister lying on the bed. "You are not unattractive, Karen." he said as he smiled and stared at her.
Karen got up from the bed and threw her arms around her brother and pulled him tight against her. Still afraid that she would feel his hard-on Mark tried to keep his dstance, but Karen looked at him with a frown.
"I don't bite, ya know. Give me a hug." she said and pulled him closer.
Mark felt his sister's thigh pressing against his hard cock and he knew it was impossible for her not to notice. After a few moments Karen pulled away and looked down at the bulge in his jeans.
"Oh, my...! So you DO find me attractive...!" she said as her brown eyes met her brother's.
Mark pulled away and stared at the floor, feeling ashamed and embarrassed, but Karen clutched his arm and smiled up at him.
"Mark, it's ok. Don't feel bad." she said, trying to reassure him "I'm flattered. Really, I am!"
Mark didn't dare return her gaze, but said "That shouldn't happen when I hug my sister."