I do think that Miwa already knows, otherwise I find it hard to understand why Koto would initially apologize, and i don't believe that the police wouldn't notify the daughter of her fathers arrest. Also I don't think the mangaka would bother writing an apology scene if it wasn't...
imma extract what happened to my friend:
chion will probably catch feelings when she realises hiruma is interested in gen, it'll further her seeing him in a different light.
in my friends case he got together with hiruma, since chion caught feelings when he was already over her
but i...
The author can afford her being in danger since they can’t really hurt her if they want the inheritance.
Let’s hope she did some big brain stuff out of frame. Maybe she hid the phone to buy time.