International Federation of Human Rights say that 75,000 Brazilian women are being forced to work as prostitutes within the European Union.
Most of these poor women come from the states of Goiás, Rio de Janeiro and São Paulo.
Those who leave are often young women who go abroad in search of a better life.
Simone Felipe, who went to Bilbao in Spain when she was 25 years old.
Simone's father, João José Felipe, lives in Goiânia, in the state of Goias.
He remembers his daughter telling him she was going to work in Spain.
She had been promised a salary of $2,000 a month.
This was a lot of money by the standards of her family........
As soon as Simone arrived in Bilbao, she phoned home to say that the reality was very different to what she had imagined.
"We are all kept here like prisoners.
We work in a club, they have taken away our documents.
We are forced to stand around in just a tiny thong bikini, and it's cold," she told her father.
"We are forced to work as prostitutes if we want to eat.
35 women sleep in the same room."
After almost three months of distraught phone calls, Simone told her parents that she was coming back to Brazil.
But shortly before she was due to travel, they received a phone call from Spain to say that she had died from tuberculosis.
With the help of the Brazilian Federal Police and Interpol, Mr Felipe managed to bring his daughter's body back home.
He says that all the autopsies carried out showed clearly that Simone had not had tuberculosis.
He suspects that his daughter was killed in order to prevent her from telling others what she knew.
The owners of the club where Simone worked in Bilbao were arrested, but released after paying bail.
The offer had been made by two girls originally from the same city, who turned up once in a while with the offer of work abroad.
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