I was an only child until one day, a sister suddenly appeared in my life. Her name is Mao, a cheerful and carefree girl who always walks around the house braless and exposed. One day, as we were chatting on the phone, I picked up my mobile and saw Mao place her hand on her chest, flashing me a mischievous, devilish smile as she began to seduce me. In that instant, I used my fingers to soak her panties before shoving a vibrator inside her, watching up close as she moaned and squirted a huge amount of fluid at climax. Afterward, Mao teased my young, inexperienced cock with a titfuck, then mounted me in cowgirl position, riding hard with deep, pounding thrusts as I became completely entranced by her. This forbidden incest sex unfolds one afternoon, drawing me deeper into pleasure and taboo.