I pushed the bathroom door open slowly, steam curling lazily into the hallway like a warm invitation I wasn't sure I should accept.
"Bella…?" I called out, my voice quieter than I intended, almost hesitant as I stepped inside.
"I'm here." her voice drifted back, relaxed and low, echoing softly off the tiled walls.
She was lounging in the bathtub, completely at ease. Her head rested against the curved edge, eyes closed, short black hair slightly damp and clinging to her forehead. The water came up just above her chest, hiding the lower half of her body beneath its gently rippling surface. Soft steam rose from the warm bath, carrying the faint scent of her usual body wash — something sweet and floral.
Her shoulders and the upper swell of her breasts remained exposed, the soft, heavy curves glistening with moisture, droplets tracing slow paths down her skin before disappearing back into the water.
"Why are you just standing there?" she murmured, not even opening her eyes. "Open your clothes and get in already."
I hesitated for a long moment, heart hammering against my ribs. This was insane. But my body moved almost on his own. I pulled my shirt over my head, then shoved my pants and underwear down in one motion.
My cock sprang free, fully erect and throbbing angrily, the thick head already leaking a bead of precum. The warm air of the bathroom kissed my bare skin as I stepped toward the tub. The water was hot enough to send a pleasant shiver through me when I first dipped my foot in — steam curling around my legs as I carefully lowered myself in opposite her.
The tub was small, forcing our legs to brush and tangle together immediately under the surface. Warm water enveloped me up to my chest, soothing yet doing nothing to calm the raging hardness between my legs.
Bella's lips curled upward into a slow, knowing smirk as her eyes finally opened. Her gaze dropped straight to my exposed cock, watching it twitch visibly beneath the rippling water.
"Look at you..." she said softly, almost teasingly. "Just so hard just from being near your big sister. Cute."
I shifted uncomfortably, water sloshing around us. "Bella… this is weird. We shouldn't—"
Her smooth, toned leg slid forward under the water, her foot pressing deliberately against the side of my throbbing shaft. The contact sent a jolt straight through me. She rubbed slowly, her sole gliding along my length with lazy confidence, toes curling playfully around the head.
"Why not?" she asked innocently, though her smirk deepened. "You got so turned on eating my pussy earlier. Don't pretend you didn't enjoy it, little brother."
My breath hitched as her foot continued its teasing strokes under the warm water, pressing my cock against my own stomach.
"You… you forced me." I protested weakly, though the pleasure made my voice unsteady. "I didn't have a choice with your legs around my head like that."
Bella let out a soft, amused laugh, her foot stroking me more deliberately now, toes flexing against the sensitive underside. "Sure, sure. Blame it all on me. But look at this poor thing, no one will believe after seeing you get a hard on like this. You really got this hard because of your sister?"
The warm water made every glide of her foot feel smoother, more slippery. I tried to pull back slightly, but the small tub left nowhere to go. Our legs stayed intertwined, her smooth calf brushing repeatedly against my thigh.
"Bella..." I muttered, even as my hips twitched involuntarily, pushing my cock against her teasing foot.
She tilted her head, eyes half-lidded with amusement and something darker. Her foot pressed harder, stroking me from base to tip in long, sluggish movements. "Just relax. The water feels nice, doesn't it? And your dick feels even nicer against my foot."
I groaned quietly, gripping the edges of the tub as she continued her playful torment. The steam, the heat, everything made my head feel foggy with lust.
"You're going to regret this later." I tried, though it sounded weak even to me.
"Maybe. But right now? I'm enjoying myself." Bella just chuckled softly. She suddenly withdrew her leg, leaving my cock aching and untouched under the water. Then, in one smooth motion, she pushed herself up into a kneeling position.
Water cascaded down her body in shining rivulets, tracing every curve like liquid silk. Her full, heavy breasts came into full view first — soft, rounded globes of flesh that swayed heavily with the movement, the dark pink nipples stiff from the contrast of cool air and warm water.
Droplets clung to the smooth undersides before falling back into the tub. Her toned stomach flexed as she settled on her knees, water streaming down the subtle definition of her abs.
Lower still, her smooth mound and plump pussy lips appeared, flushed and slightly swollen from her earlier orgasms, glistening with a mix of bathwater and her own arousal.
The rounded, bubble-shaped cheeks of her ass rested against her heels as she knelt there, completely exposed and confident.
She looked breathtaking. Dangerous. Irresistible.
"See something you like?" she asked, voice low and teasing as she watched my eyes roam helplessly over her wet, naked form.
I couldn't answer. My throat felt too tight, my cock pulsing desperately beneath the surface of the water.
The steam continued to rise around us, the small bathroom feeling even smaller, more intimate, more dangerous with every passing second.
To be continued...
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