You are stuck in Guatemala with no way to pay for food or shelter. You are in need of money so you go looking for work in a bar. A pimp approaches you and promises you money and success if you come work for him. At this point you are desperate and you agree, thinking that you will make enough money to allow you to complete your journey to the US. But you soon realize that you are in an impossible situation: the pimp forces you to take up to 30 clients per night, he keeps most of your earnings, and you cannot escape. You are stuck in Mexico.
http://www.protectionproject.org/wp-content/uploads/2010/09/Guatemala.pdf
https://womennewsnetwork.net/2014/03/17/guatemala-women-sex-workers-world/
http://www.reuters.com/article/us-health-trafficking-children-idUSKCN0R81WP20150908
https://en.wikipedia.org/wiki/Human_trafficking_in_Guatemala
https://www.state.gov/j/tip/rls/tiprpt/countries/2014/226731.htm