Inside, Majumdar takes a seat in a creaky metal chair beside a stained mattress.
War, revolution and the brutal Khmer Rouge regime in the 1970s left the nation's social structures in ruins.
Back in March, the government had closed most of the 50-odd Svay Pak brothels - known for housing underaged Vietnamese girls - in an effort to clean up the country's growing image as a pedophile's paradise.
Our car turns right down a steep and bumpy hill, and at the bottom we are jolted back to reality.
None of them looks older than 14, but they come on like seasoned streetwalkers, licking their lips and thrusting their tiny chests forward.
A shirtless boy, who is maybe 10, pushes himself to the front and gestures for me to roll down the window. " he asks in broken English as the scent of cheap perfume wafts in.