Divorce

We married before 5 years and since than we lived happily with my family.... in my wifes Family, Her Mother Father and her married sister with two child. There is no brother of my wife. after two month of marriage my wife told me that there is not much income of her Father in home so we have to support them. in some cases Financially. and i am also prepared and also i kept them as much i kept my mother-father for being their son and wife also told me that her sister has no brother so you have to be her sisters brother also....and i m also ready for that to keep happy relationships...and also I celebrate Rakshabandhan with wife sister though i know its wrong by nature, but i do this to keep my wife happy, we were trying for 5 years for a new baby. and in last one year we have also tried for IVF baby two times but we cant sucecced . in hospital due to some misunderstanding of Our families. we quarreled with eachother and her mother take my wife from hospital to her home and from second day she is asking me for Divorce. and now she tell me that there is no any income source of her home. she want to left me and my family and now she want to live with her mother father, she traying to start blamming my mother and sister and also she told me two or three times that she will case a file and also not give me divorce untill i gave her 10 Lacs,.... she is till not understand that i had spend 6-7 lacs in her ivf recently, She also know that i had also take loan from my friend of 2 lacs for her operation... She also knows that all of this mess in our life is due to her mother father but still she had more feelings for them than me.. i dont know why This type of family arrange marriages for their children to spoiled some ones life.. due to own selfishness. what can i do in this situation. Pls suggest me urgent. Yours Faithfully