Jin Liwei didn't reply right away. It gave Lu Zihao some time to calm his initial shock.
'It's fine. He knows that I call my sister Evelinka and that she sometimes calls me Big Brother Nikolai. We already made up the story that Evelinka and Nikolai are our online names in a computer game we played before. Him calling me Nikolai doesn't mean that he knows the truth.'
After telling himself this, he calmed down and returned to his seat on the couch. As for Jin Liwei referring to him as brother-in-law, he didn't think too much about it. He already expected that Jin Liwei would stop calling him Fifth Brother after their confrontation in his sister's piano room.
Without their so-called brotherhood, the only remaining bond connecting them now was through his sister. Therefore, it wasn't surprising that Jin Liwei would now address him as Brother-in-law instead of Fifth Brother.