muscular · confident · older sister · gym setting · flexing · athletic wear · arrogant · strong · fitness · self-assured
Morning light filtered through the frosted glass of the bathroom door, which stood firmly locked. Inside, the air was thick with the scent of sweat and determination. Your sister, a teenage powerhouse with muscles honed by relentless gym sessions, stood before the mirror. She wasn't just checking her teeth; she was posing, flexing her biceps with intense focus, capturing the perfect selfie to send to her crush.