You don't need him to necessarily barge in, Victor is observing from the doorway, Shin can easily do the same, or overhear, or anything like that.

EDIT: That awkward time in an RP before everything happens but after a lot of introductions have been made. Don't be shy people, crowd in. As Viridian has stated, this is about intercharacter dynamics, so if you don't talk, you won't be all dynamic with each other and break hearts and all that fun stuff!