Interpreting 2 sentences


how do you interpret these 2 sentences?

Sam: "Becky was a BITCH."

Addison at the end: "I never called her - I never called Sarah."

I have no idea what they are referring to. Why is Becky a bitch, and what call is Addison talking about?

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[deleted]

well i did understand this 2 sentences...i know why Sam said that Becky was a BITCH and that he is tired to be always on the 2nd place...it's so obvious...Sam was Becky's lover...Becky was cheating on Addison with Sam...so that's why poor Sam is always on the second place...both at work and in Becky's life.
The other sentence is about the fact that Addison forgot to call Sarah to tell her that she doesn't need to come anymore to look after the child as he decided to cancel the reservation...so...Sarah arrived in his house without knowing that she isn't needed anymore...and you know the rest...

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Before Addison left to go back to the office the night of the murder, his son was drawing the picture of Sarah. When he saw it on the refrigerator, it became clear to him that Sarah was there that night and had taken the picture. He realized that he never called her and that she had been there before his wife was killed.

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But he realised that midway through the film, not at the end. I was surprised it was filmed in a "revelation" way

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