A few days after we met, my sister-in-law asked me to have sex with her, and since then, we've been having sex. Even though we've been living together since then, I haven't had a single conversation with her. There's zero communication between us as a family. Our relationship is just about sex. When I finally asked her what she was thinking, she replied, "Because I'm embarrassed..." It turns out that her cold attitude up until now was a misunderstanding, and she's just shy! Wow, isn't this sister so cute! I love her even more now!