In this context, I feel like she was too drunk to consent. You can see that in ch. 2, she is thinking smth along the lines of, “oh god I know I was drunk but how could I think of sleeping with him”, which probably means that she wasn’t in her right mind when she consented. Also, she wasn’t staggering along the wall in ch. 2, which signifies loss of motor control, which , according to https://www.colorado.edu/health/blog/drinking-and-sex#:~:text=No.,person%20is%20unable%20to%20consent. , means that, “ consent is not possible regardless of what the person is saying or doing.”
Well your comment didn't give any contextual info and didn't specify so I gave you a general answer.
But I can see how my answer seem dismissive/ minimizing sexual assualt so here's a rewrite.
Yes,i f someone is too drunk to give meaningful, informed consent, then sex with them can absolutely be considered rape. Consent isn’t valid if someone is incapacitated. That said, there can be grey areas depending on how intoxicated someone was and what the laws say in that jurisdiction. But the key principle is, if there’s any doubt about someone’s ability to consent, the safest and most respectful thing is not to proceed.
Sorry about that.

isn't it rape to have sex with a drunk person?