Her figure is developing too much! My little sister's unguarded exposure of her huge breasts aroused my animalistic desires ~ Momose Aoi DASS-763

My younger sister, Xiao Kui, whom I hadn't seen in a long time, seemed completely unfeminine at first glance—she was practically a tomboy. She'd been staying at our hometown for a month, and one day my parents didn't get back until the morning after their night shift, leaving just the two of us at home. While doing chores, I caught a glimpse of her completely unguarded state, her clothes soaked with sweat, her breasts barely concealed. I just couldn't resist! I couldn't help but start playing with her nipples, frantically licking and sucking her breasts. She wasn't going to be outdone, rubbing my penis against her nipples, making me even harder. We went straight to the bathroom, craving each other, doing standing and lying-down doggy style, it was incredibly pleasurable. Finally, we rolled onto the bed, and I thrust deep inside her smooth little hole, I just couldn't get enough!