Cough it up !

A dad walks into a market with his  young son. The kid is holding a Ruppe coin.
Suddenly, the boy starts choking and gasping for breath. The dad realizes the boy has swallowed the coin  and starts panicking, shouting for help.
A well dressed, attractive, but serious looking woman in a blue business suit is sitting at  a Tea stall in the market reading her newspaper and sipping a cup of  Tea.
At the sound of the commotion, she looks up, puts her Tea cup down on the saucer, neatly folds the newspaper, places it on the counter, gets up from her seat and makes her way, unhurried, across the market.
Reaching the boy, the woman carefully takes hold of the boy's testicles and starts to squeeze, gently at  first and then ever more firmly. After a few seconds the boy convulses violently and coughs up the coin, which the woman deftly catches in her free hand. Releasing the boy, she hands the coin to the father and walks back to her seat in the Tea stall without saying a word.
As soon as he is sure that his son has  suffered no lasting ill effects, the father rushes over to the woman and starts  thanking her saying, "I've never seen anybody do anything like that before, it was fantastic. Are you a doctor?"
"No," the woman  replied, "I work for the Income Tax  Dept."
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