@Lithe I disagree. I think the author's intent was to keep things going by making events spin out of control the moment everything was normal. The moment life was actually bearable for the MC the world would spin upside down again, giving her new purpose. I don't understand how expanding on the story and changing the end goal from what was originally presented is a bad thing. You would have just liked her to finish the song, go to jail, end of story? That would feel in my opinion, flaccid and likely forgettable, there's certainly a lot more the author can do with the story.
Plus good heavens, any time someone doesn't care for a development or something they complain about it being "cliche", yes every single story on the planet has cliches, just one example is that most things have inspirations from the likes of Shakespeare and he wasn't even very original himself.
Edit: Also it's honestly an interesting karma/punishment setup, she stabs her father on the street, now her friend gets stabbed on the street. Plus additionally life is never so easy, just turning her self in is essentially receiving easy straight forward punishment and that's probably not going to happen. Instead she's going to likely suffer and we're going to go down a rabbit hole of insanity. Which all started because of her killing her father in the first place. Personally I think that's a really interesting narrative and will make this story more interesting and dramatic, fleshing out the anguish and just how she's going to receive "punishment" in a way that's not as easy as going to jail. Instead it'll be way more brutal and the ending becomes much more unclear. I think anyone bashing this plot development should really think about it more.