Jack was uncertain as to why his brother had asked him to baby-sit his niece Renee since she was almost sixteen and hardly in need of a sitter. When he mentioned this to Frank on the phone his brother merely sighed and explained that his daughter was grounded and required adult supervision so as to make sure she didn’t do anything she wasn’t supposed to. Jack agreed to it as he had nothing else do to that night and he owed his brother a few favors. On the way over to Frank’s house Jack wondered what Renee had done to get herself in such trouble. She always seemed to be a good kid to him. However, he reminded himself, she was getting to that age. She was a real cute girl, too. Jack remembered the last time he’d seen Renee. It’d been about two months ago during a barbeque Frank was having. She’d been swimming with some of the other kids in their pool and Jack couldn’t help but notice how she was filling out the bikini she wore. He felt guilty thinking that way about his niece and suppressed the thought.

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He pulled up in front of his brother’s house. When he reached the door Frank was there to open if for him. “Hey, Bro. Thanks a million for doing this on such short notice.” Frank was wearing a suit and tie. They must have big plans indeed.

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“No problem, Frankie,” Jack said as he crossed the threshold. “I wasn’t doing much anyway.” He looked around their spacious home. It was always so immaculately kept. It made Jack feel slightly uncomfortable. He saw his sister-in-law approaching. She was an attractive woman but always struck Jack as being rather too frigid. She was wearing an expensive-looking dress. “Hey, Marsha.”

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Marsha smiled artificially. Jack got the impression she didn’t much like him. “Hi, Jack. Thanks for coming over. Are you ready, Frank?” Frank nodded as he checked his watch.

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“Sorry, we’re running a bit behind,” he explained to Jack. “Help yourself to anything in the fridge. Renee is in her room where she’ll probably stay sulking all night. She’s not to have anyone over or talk on the phone. We’ve taken he cell so you don’t have to worry about that. Thanks again, Bro.” And with that Marsha virtually dragged her husband out the door and to their car. Jack watched them leave, waving as they drove away. Then sighing, he shut the door.

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He walked out of the foyer and into the living room, glancing up the staircase toward Renee’s bedroom. He wondered if he should go up there and say hello. He shrugged, deciding she’d come down if she wanted to. He then went to the fridge and helped himself to a beer before sitting himself in front of the television.

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A few moments later Jack heard footfalls coming down the stairs. Looking over his shoulder he saw Renee coming down. She wore a tight baby-tee that exposed her flat mid-riff and short, hip-hugging denim cut offs. Her long, thick blond hair was tied in a ponytail. She saw Jack and smiled sweetly at him. Jack waved and smiled back as he actively forced his eyes not to move up and down her slim, pubescent body. “High, Uncle Jack,” she said in a musically high voice.

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“Hey, Renee.” Jack returned her smile. “You seem in a good mood for someone’s whose been grounded. You’re dad said you’d be sulking in your room all night.”

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Renee laughed and came over to join Jack on the couch. “I would be if they were still here.” She put her long, skinny legs on a footstool and Jack couldn’t help but admire the perfect tan on them or her dainty feet.

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“Yeah, well, I guess you’re not getting along with them right now, huh?” Jack took a sip of his beer.

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“No, not really,” Renee laughed derisively. She was silent for a moment then turned her eyes to look sidelong at Jack. “Did they tell you what happened?”

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Jack quickly looked up into her large, blue eyes as he caught himself staring at Renee’s perky breasts. “No, they didn’t. Must have been pretty bad though,” he said smiling. “You’re a bit too old for a baby-sitter.”

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Renee rolled her eyes. “Tell me about it. Sorry you have to be here. You’ve probably got a dozen things you’d rather be doing.”

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“Hell, that’s no problem. Besides, we never really spend any time together,” Jack said with a grin.

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Renee returned his smile. “That’s true! You’re, like, one of my favorite relatives, too.”

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“Yeah? Why’s that?” Jack was genuinely pleased to hear her say so.

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“You’re not all stuck up like everyone else in the family. You’ve always treated me like and adult, you know? You’ve never talked down to me or anything.”

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Jack smiled. “Well, I think you’re an intelligent young lady, Renee.” She smiled her sweet smile again. Jack felt himself blushing from the praise she’d given him and cleared his throat. “So, anything you wanna do? Watch a movie…order some pizza or anything?”

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Renee shrugged her shoulders. “Well, I don’t think I’m supposed to be having any fun.”

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“Well, I won’t tell your parents if you don’t, okay?” Jack laughed.

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“Okay. How about some of your beer?” She asked innocently.

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Jack was speechless for a moment. “What?”

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Renee laughed. “I’ve never had any. I want to know what it’s like.”

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“Yeah, I’m sure my brother would want me to give beer to his underage daughter!”

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“Well, I’m not going to tell him. Would you?” Renee’s blue eyes seemed to pierce Jack’s. “I just want to know what it tastes like. I’d take one of dad’s but I think he like, counts them or something. He’d know.” Jack thought about it. Frank would be pissed but what would it hurt. Hell, she’d probably hate it and spit it out anyway. “Please,” Renee said again as she sat up and edged closer to him, her hands held up in mock pleading.

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“Okay.” Jack relented handing the beer to her. “But just one taste, okay?” Renee nodded and took the can. She took a rather large swig and drank it down. Her eyes squinted and her nosed squished up. She opened her eyes and tilted her head.

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“It’s not that bad,” Renee said before returning the can to her lips.

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“Hey, hey!” Jack reached over to stop her. “I said only one taste!” She smiled as she chugged down a couple more gulps. He wrestled to get the can away from her and she put her hands out against his chest to push him away. In seconds she had drained the can. She smiled at him and held it out to him, letting out a petite belch as she did so. He took the empty can and, feeling its lightness, glared at her. “Never drank beer before, huh?”

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She giggled mischievously. “Well, maybe once or twice.” Jack shook his head in disbelief as he set the can down on the coffee table.

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“Is that what you got grounded for? Drinking?” He tried not to smile but couldn’t help himself.

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Renee shook her head. “No, that wasn’t it.” She laid back on the couch and set her feet up on Jack’s lap. This surprised Jack and he felt himself stiffen at the contact. He laid his hands down awkwardly at his sides. “Guess again.” Renee smiled.

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“Uh, okay,” Jack said gingerly. “How about…staying out too late?”

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Renee rolled her eyes. “No, that’s not bad enough to get grounded for a month!” She stamped the back of her heels against Jack’s lap. “Think bigger!”

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“Okay, okay!” Jack reached down and put his hands on her feet to stop her from kicking him. He absently began rubbing them as he thought. “Did you…steal your mom’s credit card?”

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She laughed again. “Good idea, but no.” She looked down at her feet. “That feels good. Do it harder.” Jack was confused and looked down to find himself playing with Renee’s little feet. He glanced at her and began to rub them more earnestly. “Mmm…nice. Guess again.”

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Jack was too distracted by giving his fifteen-year-old niece a foot massage that he couldn’t think. “I don’t know…How about…” Jack felt Renee’s feet slowly writhing beneath his hands and realized he was becoming hard. He tried to fight it but his penis was twitching to life and Renee’s heel was an inch away from his crotch.

“Yeah?” Renee prompted her uncle. “Don’t stop,” she protested as Jack’s ministrations faltered. “You’re really good at this, Uncle Jack.”

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“Thanks,” Jack said absently as his hard on grew larger. He was afraid the bulge was becoming apparent and he tried to sit up and adjust himself a bit but doing so freed up space for his swelling member and with a shock Jack felt it brushing against Renee’s heel. He glanced over nervously at his niece. If she felt it, she wasn’t saying anything. She didn’t even move her feet away. She was staring at him, that sweet smile on her mouth.

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“Come on, I’ll give you one more guess,” Renee said sweetly as she put her arms behind her head, forcing her breasts slightly upward as a result. Suddenly Jack felt Renee’s heel moving slowly back and forth against his erection. He felt his face go crimson as a wave of heat washed over him. His hands were frozen on Renee’s feet and Jack felt as if he were made of stone. It wasn’t accidental; Renee was purposely rubbing against him. The contact made Jack even harder and his cock pulsed, pushing against her heel. She began to rub it up and down his length, languidly and deliberately. “Give up?”

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Jack could only nod. His mouth felt as if it were stuffed with cotton.

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Renee, still rubbing her uncle’s hard on with her foot, raised up on her elbows and stared into his eyes. “My dad caught my boyfriend fucking me in my bedroom.”

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Jack cleared his throat and when he spoke his voice sounded weak to him. “Really?” Renee smiled and nodded her head. She brought the flat of her foot down against Jack’s erection, then her toes. She rubbed them back and forth and delicately ground them against it.

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“I’ve seen the way you look at me sometimes, Uncle Jack.” Renee’s huge eyes stared intently into his. “Would you like to fuck me?” Jack sat, dumbfounded, his voice lost once more. Renee took her foot off his hard on and sat up, scooting over next to him. They were shoulder to shoulder as she reached down with her left hand and began rubbing his crotch with it. “God, it feels so much bigger than my boyfriend’s. Can I see it?” Jack closed his eyes and threw his head back in agonized indecision. Taking this as acquiescence, Renee began working the fly of Jack’s jeans. She quickly had them unbuttoned and was unzipping them when Jack looked down at her. Renee then reached beneath the waistband of Jack’s underwear and pulled it down. His cock sprang up into view, causing Renee to gasp in surprise then giggle. “Oh my gosh,” she laughed.

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He was fully erect now and Jack’s cock was of average length, around six inches, but its girth was well above average, almost that of the forgotten beer can that lay nearby. The mushroom-shaped head was even fatter. “It’s so big,” Renee breathed. She anxiously reached out and hand and began to caress it, causing Jack to groan and close his eyes. She looked up at him. “Feel nice?” He only nodded as she ran her fingers all over the bulbous head and down the veiny shaft. “Mmm…it’s so hot.” Her questing fingers dug beneath his underwear and felt his balls. She squeezed his large, soft nutsack, causing Jack’s dick to twitch and ooze a drop of pre cum from its tiny slit. “Ohhh, I think he likes that,” Renee murmured. Still caressing his balls, Renee stuck out her tiny, pink tongue and lapped up the fluid like a kitten drinking cream. Jack sighed with pleasure at the touch of his niece’s tongue against his organ and she moaned approvingly as she ran the muscle all over his glossy head.

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Jack reached down and grasped the back of his brother’s daughter’s head. He knew he should pull her away and end this but he was overcome by lust that he pushed Renee’s head slowly but forcefully down onto his cock. Renee moaned as she stretched her mouth open to accommodate her uncle’s cock, even so she could only manage to swallow the fat head. Jack began to slowly pump his hips up and down to gently fuck her mouth. Renee made gasping wet noises even as she continued to squeeze Jack’s balls. With her free hand she wrapped her fingers as best she could around the shaft and began to slowly pump her fist up and down.

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“Oh…oh, Renee. Oh, baby that’s so good,” Jack muttered. This fifteen-year old girl was giving better head than most thirty-something women Jack had been with. He grabbed her ponytail and began pulling on it, forcing her head up so his the wet head of his prick popped out, then pushing her head back down forcing it once more into her eager mouth. Jack began to push his cock up and down faster. He felt a tickling in his balls and he knew he was going to cum in seconds. Renee grasped the root of his shaft and squeezed, almost painfully hard. She withdrew her mouth from his knob with a slobber.

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“You’re not cumming yet, are you?” It was less a question than a statement. Wiping her wet mouth with the back of her hand, Renee stood up. Jack watched, wide-eyed, as she undid her shorts and slid them down her slender legs. He was a bit surprised she wore no panties. As Renee stood upright again Jack noticed she’d shaved her pubic hair. He could see a trace of her small, pink lips as Renee put on knee on the armrest next to Jack then placed her foot on the cushion on his other side. Raising her self up, she offered herself to his mouth. Jack felt her smooth pubic mound against his upper lip and nose and was assaulted by her intoxicating scent. His tongue instinctively shot from his mouth and began to explore her tight, young hole. She gasped as he quickly found her clit and began to gently lick it. His arms felt like lead as he raised them to cup her small, rounded ass and push her against his hungry mouth.

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Renee placed her hands on the back of Jack’s head and began clutching at his hair as she slowly rubbed herself up and down against her uncle’s chin and mouth. She threw her head back and moaned softly. “Oh yes…oh that’s perfect. Mmmm,” she moaned ecstatically. Thus encouraged, Jack licked harder and pushed his tongue deeper inside her. He’d never tasted such a sweet pussy in all his life. She was dripping wet. Jack could feel her juices slowly traveling down his. With a squeal Renee pushed away from Jack and he opened his eyes in protest. She looked down at him, her blue eyes hooded and filled with lust. “I want to feel that fat cock of yours,” she whispered as she sunk herself down and straddled Jack’s lap.

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He felt her wetness and heat pressing against the tip of his engorged prick. She reached down between her legs and grabbed it, steadying him as forced herself slowly down onto it. She braced herself with her other hand by placing it against his broad chest. Her face was a caricature of perfect concentration as she struggled to force her small hole over Jack’s thickness. Then, with a sudden movement, his dick head penetrated her vagina and she squealed in surprise and delight. Jack exhaled, forcing himself not to cum at the sudden sensation. It was so tight and hot. “Ohhh…it’s soo big,” Renee breathed. She bit her lip as she began to slowly ride up and down, gradually forcing the rest of Jack’s pulsing cock inside her. She then placed her other hand against his chest and gasped for a few moments before gyrating her ass back and forth. “Oh…oh…oh…that feels good.”

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Jack silently agreed. His breath was coming in sharp rasps and he couldn’t find the will to speak. He placed his hands against her thighs, gripping them tightly. He didn’t move, letting Renee do the work. He was afraid that if he moved he wouldn’t be able to stave of his orgasm. As she adjusted to his bulk, Renee began to move up and down quicker, her breathing became harsher and her occasional squeals more shrill. Jack stared at her breasts, still hidden beneath her tight shirt. He wanted to see them. He slowly lifted his hands up and pulled her shirt up over her small bra. He reached with shaking fingers beneath the cups of the bra and pulled them down, revealing Renee’s pert titties. Her nipples were hard, large and puffy. Jack tugged at them, one between each thumb and forefinger. This caused Renee to moan and buck her hips harder. He continued to squeeze one nipple while he leaned down and took the other into his mouth. He rolled his tongue all over the nugget of hard flesh, then sucked and bit it gently.

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This seemed to send Renee over the edge, she was humping him widly now. She was nearly screaming and he legs began to quiver. “I’m cumming…oh I’m cumming, Uncle Jack! Fuck me! Fuck me!” Jack pushed himself up and down, forcing his cock even deeper inside the girl. He felt his balls swelling. He was going to cum and this time he wouldn’t be able to stop it. He clutched her ass as Renee balled his shirt into her fists. Her whole petite frame shook as she screamed out loud. Jack groaned and felt his toes cramping as he felt himself cumming, shooting his wad into his niece’s bunching and pulsating pussy. He trusted up and down with each ejaculation, causing Renee to cry out even louder.

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In a few seconds it was over. Renee lay against her uncle, his cock wilting slowly inside her dripping cunt, both covered in sweat and breathing deeply. Jack was lazily stroking and patting her back. Her head was nestled in his shoulder. The reality of what had just happened suddenly hit Jack. He’d just fucked his fifteen-year old niece. A teenager less than half his own age. His brother’s daughter. A girl who he’d held as a baby. He wondered what was going through her head. Was she going to freak out? “You okay?” Jack asked at length. Renee raised her head up and looked into his face, smiling her sweet smile.

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“Hell yeah,” she said. “That was the best fuck I’ve ever had.”

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