Hmmm.. I know the forced prostitution industry works on a credit system. They smuggle the girls in, triple charge them for smuggling and make them 'work off their fee.' The girls are promised jobs and when they get here, the job changes to one of whore. The 'fee' rises, like it did back in the day of the company stores, with charges for food, water, clothing etc, etc etc.. They can never pay it off and are held in a prison house. Often the local police are paid off to look the other way.

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In Tlaxcala, sex trafficking is often a crime passed down through generations and regarded as a "cultural tradition," according to Jorge Sosa, a lawyer and anti-trafficking campaigner in Puebla.

"It's accepted in families that children prepare and aspire to become pimps," he said.

"Children even feel proud of saying that when they grow up they want to be pimps."

Another article I found on this subject..

Sept. 7, 2018

By Anastasia Moloney

BOGOTA, Sept 6 — Human traffickers in Mexico often hold the children of women sold into the sex trade hostage in order to force the mothers to keep working, campaigners said.

Traffickers prey on young and impoverished mothers, sometimes posing as a victims' boyfriend, and even marrying and having children with her, according to experts.

When women forced into prostitution do not earn their weekly quota, disobey rules, or try to escape, traffickers threaten to keep or harm their children, they said.

"A way that traffickers coerce their victims in Mexico is by getting them pregnant, and then removing the child from their care," said Rosi Orozco, who heads the Commission United Against Human Trafficking, a Mexican non-governmental organisation.

"She is then threatened continually that she will never see her child again if she doesn't do as she is told," said Orozco, a former congresswoman who spearheaded Mexico's anti-trafficking law in 2012.

In the past five years, about 400 victims of sex trafficking have suffered this way, according to Teresa Ulloa, Latin America regional director for the Coalition Against Trafficking in Women.

Victims are commonly women and girls aged 15 to 25 living in impoverished areas across Mexico, Ulloa told the Thomson Reuters Foundation.

Women are lured with false offers of work as dancers or models in cities in Mexico and the United States only to be forced into prostitution on the streets and in brothels, she said.

In parts of the central Mexican states of Puebla and Tlaxcala, sex trafficking is usually a family-run business, and the children of victims become property of local gangs, according to Ulloa.