It was rare that Shelby and Jason were the only ones in the house. For the next few days whenever she passed him in the hallway, or they encountered each other in the kitchen alone she would hug him and feel his cock and it would leap to attention. Her mere presence left him breathless with desire.
He would watch her by the pool marveling at her tiny, fit body as she lounged or swam with her brothers. Every detail of her form seemed perfect to Jason. He lived in a constant state of arousal.
For the first couple days Shelby seemed to think it were a game, she teased and flirted with a smile and touched him to see how hard he was, but then laughed and left the room. Then the sexual tension seemed to get to her as well. Soon the touches became more insistent, needy and even desperate.
Sometimes, even when others were in the room, Shelby would gaze at Jason with such open longing that he feared others would notice. Jason particularly feared Nen, Shelby's mother, noticing. Nen was a smart woman and being very good looking herself she was well aware of the attention a daughter like Shelby would attract. Nen would often chide Shelby about how scantily she dressed around the house, or when going out.
Shelby never dressed like a slut, showing off the goods but she did dress casually in thin t-shirts and short shorts that showed almost as much as something more overtly sexualized. And Shelby's favorite blue bikini was two years too small. Her breasts were not large, but still they spilled out of the top, and it would often pull off her breasts while she played in the pool. The bottoms bulged over her pubic mound and were devoured by her butt constantly leaving her gleaming globes exposed fully whenever she moved much at all.
Jason loved that bikini.
Jason also started taking any opportunity he could to watch Shelby. The way the summer had been so far he had plenty of chances to see her in her swimwear out by the pool, but after three days of sexual tension and frustration he started to watch her around the house as well.
When she watched T.V. curled up on the couch, her bare feet poking out from under her gorgeous legs, her bum when she bent over to pick something up, the swell of her breasts under a t-shirt, her neck as she spoke... All of it was pure poetry to him.
One morning when the family were all home, but bustling around madly getting ready for work, or day camp or all the various places they were going Jason crept into the bathroom as Shelby was taking a shower. He sat for a moment watching her threw the opaque shower curtain debating announcing his presence.
Just watching her outline through the plastic, the darker shadow of her skin against the paler tile behind her made his cock strain to escape his shorts. When it became unbearable, when his need to touch either her or himself became so strong that he felt he might scream, he stepped forward and cleared his throat.
Shelby froze behind the curtain, the shower still running suddenly seeming loud. Then her hand lifted and she pulled the curtain back and peered around the plastic sheet.
"I thought I felt somebody come in a moment ago." Was all she said.
Jason reached out and pulled the curtain further back.
Shelby hesitated in taking her hand from the sheet, but then released it and smiled a knowing smile and she allowed Jason to reveal her naked body.
Even though he had memorized every tiny detail of Shelby still this was a powerful moment. She was baring herself for him alone and it was intoxicating.
Shelby stood in the cascade of water her body smooth and perfect to Jason. Her hair was a long stream of brown flowing down her back, her skin was beaded with drops of moisture smooth and tempting.
Shelby's breasts were red from the heat of the water and her nipples hard and tight. The small tuft of pubic hair was plastered to her outer pussy lips and left her cleft exposed and vulnerable.
Jason sat on the toilet, little drops of water splashing him where he sat. He pulled off his shorts as he sat and his erection made Shelby smile openly her eyes full of glee.
Jason began to stroke his cock and asked her to continue with her shower.
Shelby resumed cleaning herself and With one eye on her cousin she washed her hair and let the shampoo ooze down her luscious body.
Jason had still never touched Shelby, it seemed too much to him, but as she caressed her own body cleaning herself ostentatiously for his masturbatory pleasure he had suffered from the lack. It was still too great a taboo to him.
Then Shelby, his eighteen year old second cousin began to masturbate herself.
Her fingers began to stroke her labia and she turned so that she was facing Jason from two feet away. She opened her lips and showed him the pink of her slit. This was the closest he had been to her succulent cunt and it fired Jason up immensely. His fist became a blur on his shaft as she lightly stroked her clit for him.
Somewhere else in the house somebody shouted something, but in this room all was still and quiet save the shower and the stroking hands of the two cousins masturbating for each other.
Shelby's other hand lifted to her breasts and she began to caress them as well, pulling on her tight nipples and squeezing the firm mounds.
Jason felt an orgasm approaching fast and he stood up ready to shoot into the shower.
Shelby dropped to her knees in the gush of water. It now passed over her head, only the mist of droplets landing on her head.
Still frigging herself, but now doing it to pleasure herself not her "Uncle" Shelby tilted back her head and opened her mouth showing Jason she wanted to taste his cum.
That permission was all he needed and his climax blasted out of him shooting his cum the foot between them and landing on her face staining one of her beautiful cheeks. The next gout of cum landed across her lips and on her tongue and it felt to Jason like he had broken a World Record at the Olympics he was so proud of that shot.
Shelby's tongue darted out and licked more cum from her lips as he fired more and more sperm onto her face and down her neck. It was the most erotically charged moment in Jason's life spraying his little cousin with cum. He wished his orgasm could go on forever.
But all too soon he fell back onto the toilet seat his climax complete and his body too weak to hold him upright.
Shelby still frantically masturbated, her face spattered with his load, her tongue tasting him as much as possible, reaching for the sperm still within reach of her questing appendage while she tugged her nipples and began to climax herself.
A tightening of her muscles, and shuddering of her entire body told Jason she was cumming, her mouth gaped open and she squeezed her eyes shut, the perfect portrait of a woman in the wild throes of intense pleasure.
It made Jason's balls twitch in sympathetic desire.
Then she relaxed and smiled at him. Lifting a hand she scooped up some more of his jism and ate it seductively, almost coyly, her twinkling eyes peering at him from beneath lowered lids.
She did it once more then stood up and allowed the shower to clean her of his spunk.
Without another word Jason stood back up and pulled up his pants. He slipped out of the bathroom carefully astonished at what he had just done, and that she had enjoyed it so much as well.
The week after he had first seen Shelby in the pool with her boy she approached Jason's little balcony while her brothers and some of their friends played in the water, yelling and being boisterous.
"Uncle Jason?" she opened, and he knew something was up. The only time Shelby called him Uncle Jason now was when she was horny and wanted to get him riled up. The way she said it, in a little girl voice, looking up at him coyly got him horny immediately, which was no doubt her point. "Tonight everyone will be gone and I am inviting a friend over to play. Do you mind babysitting us?"
There were a few damp towels hanging from the railing around the balcony covering the view onto from the pool area. Shelby slipped a hand inside the perimeter of the railing and groped his crotch.
Today she was wearing her blue bikini again with a pair of jean shorts on her bottom. She was standing on a deck chair to talk to him, which she and the boys did often. Her head was near the top of the railing and her arm could easily reach his cock as she stood fondling him almost in plain view of the half dozen boys messing around in the pool.
