so what did actually happen? and in what order? (spoilers!)

in the end we see her in the car with her "parents" who arent really her parents or are they? because i thought they were her uncle and aunt but then again they say theyre her parents or is that a cultural thing? like...step parents being just called parents?
ok so....did she have an accident with her parents, survived, lives with her uncle and aunt now and just fantasized the whole thing? or ...?
i mean idk its probaby up to the audience to make their own conclusions but i thought someone might tell me theirs.
anyway, a great movie. chilly but not overdramatic (maybe except the "final fight")