here’s a book plot I thought of last night
girl 1 accidentally starts a house fire that kills her sister as a teenager. She is plagued with guilt by this for several years and eventually decides the only way to stop feeling uniquely evil is to get someone else she knows to commit homicide so she isn’t alone in having taken a human life.
She convinces girl 2 to kill a man who has previously assaulted her by claiming he’s still actively stalking and threatening her and she’s scared for her own life. She then tells the truth and girl 2 is angry with her, but girl 1 points out that even though she lied and manipulated girl 2, girl 2 still showed that she willing and capable of taking a human life.
girl 2 accepts this but tells girl 1 that they’re not even because girl 1s sisters death was a genuine accident, and it would only be fair if girl 1 committed actual murder. Girl 1 agrees, then tells girl 2 it’s not fair because now she’s responsible for two deaths and girl 2 needs to kill someone else, which she does.
this is set to continue on infinity in absurdity until they realize they can never be “equal” because they cannot purposefully kill someone on accident, so one of them will always be morally “worse” than the other
they are arguing about this in the car that girl 2 is driving when she accidentally hits and kills a pedestrian. She ends up getting charged with manslaughter, neither of them are ever caught for the murders, the book ends.