I have a date with my after work to have sex because we haven't done it all week. As soon as I got home, I was greeted by the sight of Sakura, my, kneeling on the floor, revealing her underwear and seductive buttocks as if inviting me. Without, I rushed over and quickly inserted myself until her moans made me realize it wasn't Sakura, but her older sister. Angry with her husband, she had come to her younger sister's house to confide, and coincidentally was dressed exactly like Sakura, so I mistook her and engaged in intimate with her. The next day, I made the same mistake again, thinking she had left, and this time it seemed to arouse the hidden desire for sex within her. She actively came into the room to ask me to continue pleasing her while her sister was out. Thus, their secret affair continued to happen regularly, more often behind the back of the innocent and pitiful younger sister.