Wife not returning since 1 year

My wife left home during bro in laws marriage in aug 2021, she used to come during weekends with my daugher (4 years) and stay for a day and leave back to her mothers place. she told my mom she would stay at her parents place as my sister delivered a baby in july 2021 and it would be difficult for her to look after baby, my sister and my daughter at once.she said she would return in december 2021 as my sister would leave to her inlaws by then..since november 2021 she stopped coming to my home and was trying to fight with me over petty issues over phone, she was trying to make the fight into a bigger issue but i always cut short the conversation because my gut was saying shes trying to create a fight and make it a big issue.in december 2021 my sister left for her inlaws place sensing there is trouble going on btween me n my wife, then when i asked my wife when shes returning she said in few days and then after few days started calling my mom and saying she wont come back.i started visiting my daughter since january 2022 during weekends as neither she was coming home no sending my daughter to visit. in feb when we visited their home for a function, she called in the evening and started shouting on my mom as to why we are visiting their place when she said she doesnt want to come back. its july 2022 almost an year and she hasnt come back.couple of days ago she called my mom and said she was thinking of filing for a divorce and that we should return her jewellery, cash(that i and she saved together) and also that we should arrange some amount for my daughter. my mother in law and bro in law are doing nothing to save my marriage.the problem is my bro in law mortgaged his home and with the loan amount tried to do some business and failed, now there is a huge debt on them, the pension my mother in law recieves is going for the home loan emi, and they are survining on my wifes salary. sending her back would be like killing a golden duck for them. i think they have brainwashed her into taking a divorce so that they can claim some of my fathers property and with whatever amount they get (maybe as part of alimon) they can clear off their debts.(we recently gave our land for real estate developtment). my bro in law does nothing, he left a central govt job that he got post my father in laws demise, his wife is working but she was much clear before their marriage that 80% of her salary would go to ther parents as they have some commitments. what do i do?how do i handle the situation? my wife was not like this before, my daughter is 4 years im worried about her. how can i get her back? their relatives are saying her mother should talk some sense into her and send her back, but that lady is least worried about her.