What to do if the inlaws are interfering

My wife's parents and brother have so much influence on my wife, they interfare so much in my married life and this becomes the reason of quarrel bw us. My wife's sister is in Australia and ask us to come there on pr, initially i was interested but now am not, as i have an old dependent mother and good job in india. My wife is angry over me on this and his parents are pressurising me for getting passport for my 2 months daughter(they may send my daughter and wife to his sister in Australia), they even threatened me that if i dont make passport of my daughter they will false report to the police that am going to settle abroad leaving behind my daughter and wife. My wife has disrespecting my mother and uses false words for me, i am afraid she and her parents might charge me for false cases. I don't know what to do, is there any law which can help me to get out of this situation.