How did the fake emails manipulate responses?

What looks like a dream marriage for Ollie Wards' brother Greg soon morphs into a nightmare. With the whole family drawn into the mess, his parents go from a comfortable retirement to being homeless and squatting in the basement at his Aunty's house.

Even though she was on a tourist visa in New Zealand, Greg's American wife had secured a massive loan from the country's state-owned bank. After she flies off, never to be seen again, a box of documents from the bank transaction surfaces.

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