It all started with a casual peek... but her soft breasts, plump butt, and cinched waist... I couldn't help but get aroused by my sister's blossoming teenage body. I kept catching myself staring at her while she bathed, becoming increasingly captivated by her allure. One day, our eyes met... "I knew all along that you've been watching me," she said with a mischievous grin. Her devilish side ignited my libido. Her damp hair, the faint scent of shampoo, and her sun-kissed skin from the summer heat sent me into a frenzy! Wrapped in a sense of forbidden pleasure, I lapped up her seductive body, our bodies entwining in a sweaty, passionate embrace. Our chemistry was so good that my sister's invitation to peek into the bathroom became a signal for our illicit sex...