Factual error: When Dahlia is on her cell phone with her lawyer, she goes down into an underground subway and is still talking to him. Her call should have been cut short, because cell phones in NYC don't work in underground subways.
Dark Water (2005)
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Directed by: Walter Salles
Starring: John C. Reilly, Tim Roth, Jennifer Connelly, Dougray Scott, Ariel Gade
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Answer: The drunk woman in the begining of the movie was Dahlia's mother. (Remember, the husband was going to say that Dahlia was unstable because she had an abusive father and an alcoholic mother) That was a flashback. Dahlia was dreaming when she saw herself throwing up in the toilet.