Meiko and I have been dating for two months, our relationship is very pure. Today Meiko's parents went on a trip, so only she and her older sister Riri are at home, she invited me to her house to hang out and it seems like this is a breakthrough for our relationship. When I arrived at her house, I met her sister. My first impression of her is that she is very beautiful, with a mix of grace and innocence. But during dinner that night, when my girlfriend went to the restroom, her sister approached me, whispered seductive words in my ear, and suddenly kissed me! The sweetness of her tongue, the scent of her body, and her provocative words made my manhood uncontrollably erect! Seeing that I was uncomfortable, she helped me relieve the tension by stroking me. And from then on, our secret relationship began, we sneakily had sex with each other even when my girlfriend was right beside us!!!