NPH-049 - Tsundere younger sister's defenseless panty tease - Hikaru Minazuki Hikaru

My girlfriend came to my house, and my sister said, 'Don't peek into the room,' and had sex with her boyfriend in the room. Knowing that I, her older brother, was peeking, she deliberately teased him by licking his penis. My sister has pent-up desires due to her excited boyfriend. I was left alone with such a sister and was playing a game when I became aroused by a panty flash. When my sister noticed my erection, she said something mocking, so I opened my legs, and she became excited. Our sexual desires didn't stop, so I used a vibrator, and she had an orgasm. I had her take my erect penis deep into her throat, and we crossed the final line. I put my penis into my sister's vagina, and my overly excited sister couldn't stop having orgasms.