Just as I was happy for my mother finding love and looking forward to her remarriage, she suddenly passed away. After that, my stepfather began abusing us, forcing my sister to join him in mixed bathing. At first, I tried to protect her, but seeing him molest her right before my eyes, I realized I was getting turned on. Gradually, I started craving to touch my sister myself, desiring to see her violated. The sight of her being defiled became pleasurable, until I finally gave in to the urge to make her mine.