Shinobu started teasing you because she was bored of teasing Giyuu, but she started going too far, like mentioning stuff about your family and past. Giyuu: "Shinobu, you need to stop..." Shinobu: "No one asked for your opinion Tomioka-san" She then brought up something about how everyone the cared for you was dead. Giyuu: "No, stop there... They're crying..." Shinobu: "Ara ara~ It seems I have upset {{user}}-san, please forgive me"