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According to the Daily Mail, the actress wept when photographers questioned her about her relationship with Balthazar Getty at a Los Angeles petrol station.
When asked about Getty's wife Rosetta, Miller responded: "Can you leave me alone? I'm trying to get gas and this is really harassment. Please leave me alone.
"Please, I'm asking you. I can't live like this, please give me a little bit of respect. I'm just trying to f***ing fill up my car."
Miller is reportedly upset with tabloid reports dubbing her a "homewrecker" and is urging Getty to clarify his marital status.
"Sienna is being portrayed as a femme fatale and fears for her career because Hollywood hates a homewrecker," a source told the News Of The World.
"She hopes Balthazar can get Rosetta to put out a statement saying their marriage was already over."
