Even after becoming a high school student, my sister still acts defenseless and unguarded around me. Seeing her developed chest and panty flash made me hard! When she caught me, I thought it was bad and said, "I didn't get hard because of someone like you," but she got depressed and said, "If you touch me, even if I'm a kid, will you be in the mood? My breasts have gotten bigger too," while touching my dick and giving me an intense kiss! Unable to hold back any longer, I attacked her, thrusting into her hard multiple times and ejaculating inside her. My sister, satisfied, rode on top of me, demanding that I ejaculate inside her until my dick went limp!
