Am I the only one who was extremely confused by the writing? I think the whole effect was just lost on me, because I went from thinking her brother was the one

Am I the only one who was extremely confused by the writing? I think the whole effect was just lost on me, because I went from thinking her brother was the one who died, to thinking he was the driver, to finally getting to the part where she actually says explicitly that he was the other boy in the road.