I am Sayuri Sato, 40 years old. I have been married for 12 years. We have no children and live as a couple. About a month ago, my sister started staying with us. Unlike me, my free-spirited sister disrupts our daily routine by walking around the room completely naked in front of my husband. Lately, I feel like the distance between my sister and my husband is getting too close. Just when I thought that, I heard my sister's lewd voice coming from the room...
