Hello, We are 2 sisters and one brother. I am eldest sister. After my marriage, my parents bought a

Hello, We are 2 sisters and one brother. I am eldest sister. After my marriage, my parents bought a land in 2001 after selling their previous self bought property in Delhi. Earlier and this property were both in my mother's name while she is a house wife. They took bank loan to build a house on that. My brother (middle child) was made a coborrower in that. My parents are staying in this house with my brother. My young sister (married and citizen of Australia now) is settled abroad. My mother wanted to give me bigger share in property as I have 2 daughters to marry but my brother has forced my mother to make a transfer deed in his favour so that later on we sisters do not get any share in that property. Can I challenge this transfer deed. My mother is ready to say in front of magistrate that transfer deed was done by forcing her emotionally and physically.