Note: This story was dynamically reformatted for online reading convenience. This fictional story is a work of the author's imagination for the reader's enjoyment. It involves underage siblings in adult situations. If this bothers or offends you, please do not read any further. Taking a bath with Sis Kyle had always found his little sister attractive. Sure, Christine was young, but there was just something about her. A magnetic pull. An insatiable desire. Maybe it was her long blonde hair. Perhaps it was her flat tummy, her perfect legs, or her pouty lips. Whatever it was, the feeling was undeniable. At 15 years old Kyle was four years older than his younger sibling, yet somehow her age didn't bother him. In fact, to Kyle, Christine was the most beautiful girl in the world. Teenage boys fantasize about sex constantly, of coarse, and he spent all his time thinking about her. He wanted her to want him more than anything in the world. That would be bliss! Christine and Kyle's mother and father had split up so they spent a lot of time together after school and often later at night when their mother worked late or went out on a date for the evening. They'd usually just watch TV, eat dinner, and go to bed. One evening, their mother was walking out the door. "I'll be late tonight. There's frozen dinners in the freezer." "Okay, mom!" Kyle said. "See you later." He watched as the door closed shut. Kyle yells up to his sister who's doing some of her homework in her bedroom. "Hey Chris!" "What?" "Are you hungry? I'll nuke some lasagna!" "Okay!" Christine's voice echoed down the stairs. A few minutes later she came down the stairs and into the kitchen. Kyle looked at her, still in her school uniform - a blue plaid skirt and a white blouse. Her white silky legs extended from her skirt down to her white ankle socks. Perfect. "Dinner's ready," Kyle stated as he pulled the tray out of the microwave. "Let's eat downstairs." Kyle put the food onto two plates, handed her one, and proceeded down to the TV room in the basement. He plopped down on the couch while his sister sat on the floor a couple of feet in front of him. As they ate Kyle couldn't keep his eyes off of the goddess in front of him. He imagined her blue lustfull eyes staring into his, just asking for gratification. He stared at the back of her neck, imagining his lips softly kissing it as her head turns to the side while she lets out a small moan of pleasure. He thinks how wonderful it would be to put his arms around her little waist as her skirt-covered buttocks pushes invitingly against his bulging pants. They were finished eating. Christine was just watching television, oblivious to the raging adolescent mind behind her. Kyle's heart begins to pound in his chest as he actually contemplates how to go about propositioning his eleven year old sister. He knows he can't simply ask her to sleep with him. If he got up and started touching her, she might slap him and run away.... He had to do something tonight...and he had an idea. "Hey, you want to take a bath?" "What, together?" "Yeah." "Okay, we can wear bathing suits! That sounds fun!" Christine replied. She still had no idea what was going through the boy's mind. Kyle didn't care, though! He was about to be alone in the bathtub with that smoking hot little girl. So the two of them made their way upstairs. Christine went into her room and Kyle into his. They both emerged a minute later in their swimwear. Kyle eyed up the pre-teen in her bikini. Her blonde hair swept over her shoulders down to the tiny mounds of her barely budding breasts. Her figure curved down to her little waist and then to her bikini bottoms. The promised land. Even her bare feet drove him wild. They walked into the bathroom and Kyle started the water. The tub filled a bit and they hopped in. Kyle sat at the deeper end by the drain while Chris sat across from him. As Christine talked about her friends at school, Kyle's eyes drank in her exquisitely sexy body. He wondered what to do next. "Why don't you take off your bathing suit?" He asked. He just threw it out there, hoping for something. She just laughed and blew it off. So he pushed a bit further. "I will if you will." A look of astonishment swept over her face as she realized he wasn't kidding. "What, you mean it? You first!" Kyle was cool with that, but he had to get his courage up. He put his thumbs under his waistband. He asked himself for a moment if he wanted to do it. He looked up at her eager eyes and pulled off his trunks. Christine gasped. Not at his cock, which was standing tall, but rather the fact that he had actually done it. She glanced down and looked away. "It's ok, you can look." She stared down studying the first real cock she'd ever seen. "Your turn," Kyle stated. "Do I have to?" "Yeah! I'm sitting here naked in front of you, you better do it!" Christine then took her top and pulled it up over her head, revealing her little nipples on her little mounds. She went to pull down her bikini bottoms, hesitated much like he did, then pulled them off. Kyle was in awe as he saw his sister's hairless slit for the first time. He took his swollen member in his fist and slowly rubbed it. "What are you doing?" she asked. "Do you know how hot you are to me?" Kyle responded. "I think about you all day, every day. You are the sexiest girl in the world to me. I want you so bad." "But I'm your sister..." "I know, but I can't help how I feel! Brothers and sisters do it all the time, just nobody talks about it. It's perfectly normal to be curious and explore each other." He pulled the plug to drain the water. "Let's go to my room." As the two got up, Kyle cock was standing strait up as he watched the water run down her thighs. He handed her a towel, got one for himself, and the went across the hall to his bedroom. She jumped in bed first and sat against the wall. Kyle followed and sat on the edge of the bed. "Have you ever kissed a boy?" he asked her. "Maybe." He leaned across and gently placed his lips against hers. She pushed her lips back out towards him in response. Kyle was in ecstasy. He slowly parted his lips and slid his tongue between her lips. She immediately responded by opening her mouth and letting her own silky tongue gently slide against his. She pushed her chest towards him and wrapped her arms around his head. She was enjoying this much more than she had expected, as her heart began to pound in her chest as hard as his was. They fell back with their heads against his pillow, still wearing their bath towels, making out with a passion and intensity not expected of ones so young. Kyle's hands rubbed her back and waist then started to rub her ass and pull her pelvis into his. He pulled his lips away from hers and kissed that neck he had so longed for. "Oh...," she whimpered. His hands now found where the towel she was wearing was tucked in, keeping it on her wet body. Christine continued to kiss him as she took her weight off of him so he could pull the towel out from under her. She took the opportunity to do the same to his towel and they threw them both on the floor. Before she could lay back down on him, Kyle got up, told her to hang on one second, and ran to his mother's room. He had snooped around enough to know where she kept her vibrator. He grabbed the lubricant sitting next to it and went right back to her. "What's that?" she asked? "It's called lube. It'll make things much easier and more comfortable for you." He crawled back into bed and layed on his back while his sister sat on her knees, watching. He flipped open the lid and squeezed a bit onto his raging dick. He spread it around a bit with the tip of his finger. He put a little more on the same finger and reached for her tight slit. Slowly he rubbed the slippery goo up and down her smooth opening, pushing on her clit every time. "That feels so good...," Christine groaned with her tiny little voice. Kyle sat up and continued to pleasure her pussy as their tongues met again. After a couple minutes, they couldn't take the anticipation any longer. Kyle wrapped his arms around his little sister and pulled her on top of him, lips locked the whole time. Kyle felt his slippery member sliding along her wonderful pussy. He instinctively pushed his pelvis up towards her and she immediately did the same, pushing back on him. "Does that feel good?" he whispered in her ear. "Yes," she answered, barely audible. "Open you legs a little bit more." Kyle's rock hard member needed better access to where it was going. Christine spread her legs so her knees were close to his hips. As they slowly humped each other, Kyle could feel the tip of his penis find the spot. He slid his hands up her back and put one hand on each of her shoulders. Then he pulled her down as he pushed his cock upwards. He felt her hot pussy around the head of his penis. Christine gasped. "Are you okay?" he asked. "Yes," she breathed as she pushed back on his dick even harder, forcing his dick into her virgin opening. She then put her hands on his chest and pushed herself up, sitting on his dick, filling up her love hole. She sat still for a minute, getting used to the feeling and letting the pain pass. Slowly she began to rotate her hips forward and back, sliding her brother's hardness in and out of her. Kyle looked up at her angelic face as she bit her bottom lip, closed her eyes, and looked up at the ceiling. He couldn't believe his cock-head was feeling the tight, slippery womb of the hottest girl in the world. He grabbed her ass with either hand as she swung her head down and started kissing his neck as she moaned. Kyle started pumping her as fast as he could. Christine reached her peak. "Ohh!.......Ohh!.....Yes!..... Ahhhh!" She shuddered hard and squeezed her thighs against his hips, humping her lover with all she had. This drove Kyle to the brink. As she came on top of him, his cock exploded inside her as waves of ultimate pleasure washed over him. "Oh, fuck yeah!" he yelled as his come spilled out deep inside her. They finally came to rest as she collapsed on top of him. "That was wonderful!" she told him. "You are amazing!" Kyle huffed, catching his breath. "You just made my every dream come true..."