When I was sweating in my tight yoga pants and sports bra, doing squats and stretches in the living room, I never imagined what would happen that day. Sunlight poured through the floor-to-ceiling windows, my body glistening with sweat, every curve on full display.
My name is Vivi. I’m a fitness-obsessed girl. My stepbrother Kai had been acting strange lately, his eyes always lingering on me. I thought it was just teenage hormones until that afternoon when I bent over during yoga and caught his reflection in the mirror.
He was hiding behind the couch, pants around his knees, furiously stroking his rock-hard cock while staring at my ass.
The Moment He Got Caught
“What… are you doing?” I spun around, face burning. His hand froze mid-stroke, cheeks pale, yet his eyes burned with shameless excitement. The air became thick. My heart pounded so loudly I could hear it in my ears.
Instead of running, he kept breathing heavily, eyes glued to my sweat-soaked breasts and perky ass. To my shock, I felt myself getting wet.
From Shock to Uncontrollable Lust
I should have yelled. I should have told our parents. But when he whispered, “Sis… you look so fucking hot like this, I couldn’t stop…” something inside me snapped.
I didn’t leave. Instead, I slowly walked closer and turned around, arching my back and pushing my ass toward him as I continued my workout. He started stroking again, faster this time. The sound of his hand sliding over his slick cock mixed with my heavy breathing. Finally, with a deep groan, he exploded, thick ropes of cum splattering onto the couch.
The mixture of shame and arousal that flooded me was intoxicating.
Our Secret Taboo Games Begin
After that day, our forbidden little game escalated quickly. I started wearing even tighter, skimpier outfits on purpose. He would appear every time I worked out. The danger of getting caught only made it hotter.
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