Once again, Viktor is caught between the anger he has for the situation and an innate need to offer Jayce comfort. Whatever they spoke about, it's clearly shaken him up all over again, and for as much as Viktor still harbors disappointment about these particular actions, he does wish for Jayce to come to terms with it--to not be so haunted by the wrongs he committed. An impossible ask, maybe, but Viktor can't stand to see him grieving, even if self-inflicted. It seems unfair, that they should chase away the threat of Viktor's death only to have to deal with this, instead.

So he's sympathetic, shifting in the bed to get closer to Jayce as he sits on the mattress. Jinx being Vi's sister does explain a lot--Viktor doesn't have siblings, but he knows full well that family in the Undercity was found, more often than not. To lose it, and, presumably, lose it to Silco was likely more than Vi could bear. No wonder she wanted to do something.

It doesn't mean he has to be happy about it. Viktor can feel sympathy for her circumstances--he remembers the failed uprising--and be frustrated by her actions regardless.

Still, he can easily tell that it's not just her arrival that has Jayce on edge. There's more to be said here, Viktor just needs to pry it out. "And? What else?"