Maintenance and partition appealed by widow doughter in law to her father in law

My brother got married in the year 2008 and got a baby girl in 2009.He is a farmer and residing with his retired father and housewife mother.Due to some family disturbances between husband and wife ,they shifted to a separate house owned by my father.After six month my brother died due to illness.After that my father brought all house hold items from that house to his residential house to live together to protect his widow daughter in law and his granddaughter of 10 years old. But daughter in law and her daughter went away to her fathers house and lived there. Now she is claiming maintenance and partition from father in laws property in family court. 1.She has two acres of cultivation land and house land left by her husband. 2.she is residing with her father who is a retired person and getting near about 25 thousand rupees as pension per month.. 3.she has some bank loans in her name and her husbands name. 4.She is 33 years of old and have moderate qualification to get a job. Please let me know 1.Is my father is liable to maintain her and upto what extent? 2.Upto what age my father is liable to maintain her grand daughter for her studies. 3.my father is willing to give a separate house to stay but she denies to receive that.Insted claiming house rent to stay at near by fathers house. 4.who is liable to pay the loan amount to the bank.