Katie Chiltern grinned laughingly at her granddad as he dove into the swimming pool in a vain attempt to snatch the rubber floating toy from her grip. He rose from the water and splashed his teenage granddaughter with a flick of his right arm, before lunging forward and grabbing her wrists and pulling her tightly to him, invoking a high-pitched squeal of surprise from the 16-year-old. Despite the tight lock of his arms around her torso she managed to spin around in his grip so that her back was to him, and in doing so her ass brushed the older man’s groin and upper thighs, stirring the cock beneath for the first time in many weeks. Barry Morris again scolded himself for the blatantly sexual thought which spun into his mind at the touch of her tight little rear against his dick, for it was not the first of the day. No, the first had come when Katie had emerged from the house and dropped her robe to reveal a blossoming young female form, concealed only by a highly-cut white one-piece swimsuit. The small but immediately noticeable swelling of her young hips, the tapering waist and rising young breasts all made Barry forget that he was looking at his daughter’s daughter and not some common street girl, or Sarah Bright, the 18-year-old who lived next door upon whose form he had gazed many times.
The second obscene thought came after Katie had risen from the cool water and stood atop the diving board, the hot sun blazing behind her. Barry couldn’t believe his eyes. The water had made the white swimsuit translucent, and with his eyes squinting, he could clearly make out the small globes of her breasts and, more excitingly, the small pink pricks of her nipples sitting centrally on them. They were still developing, and had taken on the swelling cone-shape of pubescent girls, with large pale pink areolae overly sensitive to touch and to cold. His gaze dropped downward to her pussy, and he could barely make it out – a thinly covered patch of down, light brown like her long hair, nestled between her upper thighs and with the slight protrusion which comes with adolescence. Unlike the first thought, this one had caused his cock to fill and become semi-hard.
All this re-entered his mind as his teenaged granddaughter fought to abscond from his grip, her long hair brushing his face and her squeals of laughter and mock distress filling the air. More importantly, her frantic thrashing and wriggling only served to move her firm buttocks back and forth against his bursting cock, and before long, his organ was engorged with blood and filling the front of his blue cotton swimmers. Afraid of being discovered and fearful of the consequences, Barry drew his hips back slightly to avoid contact between his erect penis and his granddaughter’s ass, but it was no good – her movements persisted and, in a matter of seconds, the long hardness of his rod had, in one movement, pressed itself firmly against Katie’s young ass-crack.
All at once her writhing ceased and, with dreadful awareness, he realized that she knew. She knew he was hard. And, despite her tender age and inexperienced, she would know what had caused it. Barry felt sick in the pit of his stomach, knowing that his relationship with his young granddaughter would never be the same again. Yet he didn’t say anything, and he didn’t release his grip on her.
“Grandpa,” Katie’s voice broke the air. “Why is your thing hard?” Barry’s mind raced for the correct words to use, for the appropriate excuse which would prevent embarrassment, both to him and to her. But it took him too long, and she sensed it, shifting uncomfortably in his grasp. However just when he thought she might break free, or speak again, Katie’s right arm dropped down between them, and her small hand plunged down his bathers and gripped the length of his aching shaft.
He was lost for words, and the heat of her hand in the coolness of the water provided an incredible stimulus to his genitals. His testicles drew up quickly and whatever blood remained in his groin quickly raced to his penis and it became fully erect and primed, perhaps for the first time in two years, the last being a visit to the town whore some three years after his wife passed away. Despite a lack of experience, her hand knew its own instincts and started to stroke, slowly at first, back and forth along his tactile organ, raising nerves in his rectum and upper thigh and forcing a muffled breath from his pursed lips.
Her hand rubbing his prick and his confidence increasing, Barry abandoned his doubts and decided to take action. His own right hand, previously frozen, rose over her waist, upwards, and clamped onto his 16-year-old granddaughter’s right tit. He squeezed firmly, but there was little response in the taut young breast, just an ungiving firmness and an out-of-place point in his palm which was her nipple. He groped her tits as his breath increased and his orgasm neared, then his hand travelled down over her flat stomach and protruding hips, up the smoothness of her thigh, stopping at the elastic in the gusset of her swimsuit.
His long middle finger extended and found its way under the elastic, and was soon joined by another, and then another as his hand crept towards its goal. His fingers made up the soft, scant patch of pubic hair, then moved down to stroke the small but defined cleft of her pubescent teenage genitals. Like his own, Katie’s breath became erratic and labored as he stroked her vaginal lips vertically but gently, her ass pressing back and sandwiching her stroking hand and his cock against his groin. Soon he would come, and it was his ambition to reward his granddaughter with a similar delight.
With this in mind Barry, with his middle finger again, spread her labia and moved towards the top to search out her clitoris. It was not a difficult task, for it was already extended from its hood and standing proudly, waiting for his assault. With his index and ring fingers holding the lips apart, he began to gently massage it, paying special attention to the tip and varying the pressure in a time-old rhythm. Soon his touching was matched by a slow grinding movement in her lower body, as she lay her head back on his left shoulder and emitted a low, guttural groan.
The game went on for three minutes, no more, until his balls began to rumble and his orgasm became imminent. Aware of this, he increased both the speed and the pressure of his finger upon her young clitoris, which caused Katie to tremble so violently that her granddaddy was forced to physically hold her up with his free left arm around her slim waist. Yet her hand never ceased its ministering, and its motions became faster and faster, until it reached a crescendo, and his seed spilled out into the water and down her small, tightly gripped fist.
His orgasm stung at first, but the aftermath shook his lower body in a wave of physical pleasure which caused his eyes to roll back and his skin to erupt in goosebumps. However his own task was not complete – his finger diddled her clit faster and faster still, her mouth open and giving out grunts of approval, until she stiffened and jerked, and then all at one became limp in his arms. They stood there, waist deep in the water for a full minute before Katie spoke. “Ooh Granddad” she cooed on his shoulder, before turning her head and burying it in the grey hair on his chest. He held her tight, then broke free and rose from the pool. “Cmon on sweetie,” he said with a wink… “Lets go up to your room”.