Guddi was only 11 years old when her family was persuaded by a neighbour to send her to the city of Mumbai hundreds of miles away from her poverty-stricken village in the eastern state of West Bengal.
They promised her a well-paid job as a housemaid to help feed her family.
Instead, she ended up at one of Asia's largest red light districts to become a sex worker.
Trafficked by her neighbour, she arrived at a brothel. She was raped by a customer and spent the next three months in hospital.
Guddi's sad and harrowing story is similar to many of the estimated 20,000 sex workers in Kamathipura, established over 150 years ago during colonial rule as one of Mumbai's "comfort zones" for British soldiers.
"They raped her to break her," said Ms Thompson.