I drive the car at top speed, hurrying to the institute, where Katya has been waiting for me for half an hour. I'm nervous about being so late, because I promised her that I would only be fifteen minutes late, and ideally I expected to arrive even earlier. It seems to me that nervousness will now be my constant companion in those moments when my sister is not next to me. Hell, I had a hard time letting her go back to sleep in her own bedroom. Even though I knew I had no right to keep her in mine. How would I explain it to her? It would not...