How much money do I need to pay to my wife if she is living in my parent's house

Respected experts, I am in the USA and my wife just gave birth to our daughter in India, in her maternal home town. After a month of the birth of our baby, she is willingly living in my parent's house in Mumbai. She has been asking me a lot of money on the name of her pregnancy ever since she left for india (in April 2017). So far, in 8 months, I have given her 1.25 lakh rupees towards her expenses even though she has been living in either her or my parent's house, where she doesn't have to spend on accommodation and food. She keeps threatening me of going to police and file a complaint against me if I do not give her more money. Upon asking, she says she spent 40K on her delivery. That means she spent around 80K in 8 months towards other expenses. My question is: is it necessary in the book of law to pay the wife a certain amount of money if the wife is willingly living in either her or my parent's home? (She doesn't work and has an MBA degree from India). How legal it is to keep extorting the money from husband on the name of pregnancy? I must say that everyone including me expressed our desire for the baby to be born here as I am settled in the USA. Still, just to keep her mentally at peace, I agreed that she goes to India to deliver. I bring home $49K and live in San Francisco, which is one of the most expensive city in the USA. I barely can save around $600/month. I always tell her to be cautious in spending as we have a baby now, and I have to secure some money for her future too. We were married in India, in 2015. Kindly advice.