@frenchfry
He is acting that way because she is different from usual. He is in shock because of the changes. Their interaction seems confusing because he feels confused lol.
And she knows who the culprit is. But I guess she didnāt tell him about it (?) well, there are not any evidence. Or did she tell?
I guess, she asked: ''Whom will you use as scapegoat?'' or something like that.
...
I just forgot what I did read lol.
Anyway, this interaction was weird because sister was totally different person.
āāāā-
Thank you for translating! <33