Beautiful Older Cousin

Oppressed by the pressure of grades... During this period, I had become quite skilled at staying up late.
In the silent late night at 1:30, when people are in the deepest sleep, I quietly opened my sister's door. She, a year older than me, was lying on the bed wearing dark black sports shorts and a white loose shirt, her small mouth slightly open, clearly already in a deep sleep state.
Tiptoeing closer, I lifted the leg of the sports shorts, revealing a pair of small floral cotton panties. Then I sat on the edge of the bed, slowly pulling the white shirt up to her neck, exposing my sister's entire chest. Although her breasts were flattened by gravity, making the cup size hard to tell, those light pink areolas and vibrant nipples seemed to be greeting me, causing me to unconsciously lean closer to my sister's chest. A faint feminine scent came from the tip of my nose, making it even more unbearable... I really wanted to take a bite!