Did the older woman actually say at any time that the younger woman was her daughter? I assumed she was, but then it struck me as odd that Mia would be willing to kill her mother in that way.
shareshe said it, but we can assume that it was a lie.
shareThe older woman did introduce the younger as her daughter when they first arrived at the cabin, but I'm pretty sure that the younger said to the older, later in the film, you were the one who found me (or something like that)...
** We both looked into the abyss, but when it looked back at us you blinked **
She was talking about how the older woman used to protect her, how she used to be the one who would have found her, but now she is too old and it was the man who found her and saved her after she was taken.
That's the start of her realising she needs the man more than the old woman.
"Men on fire pray for rain"