so like you have the whole premise, sister's new husband and his family are cannibals and start attacking everyone at the party. run.

after the entire evening on towards dawn the main character, out of nowhere, randomly does a complete 180 and decides to join the cannibals who just killed her parents and have been trying to kill her? and is suddenly fine attacking and eating her sister with whom she has been surviving this whole time?

and i cannot stress enough that i get that she has a rough relationship with her family and she's meant to be an unreliable narrator but 'leaving her family to get eaten' would make more sense for her character than this. she has nothing but contempt for all these people even aside from their cannibalism

well anyway after she bites her sister some weird shit happens and it's revealed that actually none of the cannibalism really happened, the entire wedding and long night of surviving after was just an incredibly vivid audiovisual hallucination caused by her withdrawals but actually only a couple of seconds? minutes? unclear. have passed. but she DID maul her sister's face irl and now she's going to jail womp womp

and i know the author thought she was being clever by mentioning hallucinations being a possible symptom, and having the mc go "wow this sure is stupid and makes no sense" all the time but. it's stupid. also felt pretty damn offensive. it would've made a better movie than a book, but it wouldn't have made a good movie either