The sun beat down on the backyard pool, casting shimmering ripples across the surface. Bob, the resident prankster, tiptoed around the side of the house, a mischievous grin plastered on his face. He clutched a small package tightly to his chest, his heart pounding with excitement.
As he approached the pool, he saw his sister, a strong and controlling character, gracefully gliding through the water. Her bikini, a modest black number, clung to her curves, the water making it nearly transparent. Bob's eyes widened as he took in the sight of her breasts, the dark areolas visible through the soaked fabric. His gaze drifted lower, and he felt his breath hitch as he saw the dark triangle of hair between her legs.
Without hesitation, he pulled out his phone and snapped a quick photo, trying to hide his growing excitement. He had to admit, this prank was turning out better than he had anticipated.
His sister, unaware of his mischief, climbed out of the pool, her wet bikini clinging to her skin. She shook her head, sending droplets of water flying in every direction.
Bob couldn't help but stare as the water droplets traced a path down her body, highlighting every curve and dip. He felt his cock stir in his shorts, and he quickly looked away, trying to hide his arousal.
His sister, noticing his strange behavior, turned to him with a playful smile. "What's wrong, Bob? You look like you've seen a ghost."
Bob stuttered, trying to come up with a believable excuse. "N-no, it's just...the sun is really bright today."
His sister raised an eyebrow, her smile growing wider. "Oh, is that what it is? Or is it maybe because you got an eyeful of your big sister in her bikini?"
Bob's face turned bright red, and he felt his cock twitch in his shorts. There was no denying what he had done.
His sister, amused and slightly annoyed, held out her hand. "Well, since you're already being a pervert, why don't you show me what you've got?"
Bob hesitated, but eventually handed over his phone. His sister scroll through the photos, her expression unreadable.
When she reached the photo of her in her wet bikini, she rolled her eyes. "Oh, Bob. You really are a horny bastard, aren't you?"
Bob felt his face grow even hotter, if that was possible. "I-I can explain..."
His sister, still playfully insulting him, handed back his phone. "Save it for someone who cares. And put that thing away before anyone sees."
Bob, embarrassed, tried to adjust himself discreetly. But it was too late. His sister's eyes widened as she noticed the bulge in his shorts.
She burst out laughing, her body shaking with amusement. "Oh my god, Bob. You're such a loser."
Bob, defeated, tried to hide his erection. But it was no use. His sister's laughter only seemed to make it worse.
"Get lost, Bob," she said, still laughing. "Before I do something drastic."
Bob, embarrassed and humiliated, quickly gathered his things and left the backyard. He vowed to come up with a better prank next time. One that didn't involve his sister's bikini and his growing arousal.
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