Will Issue

My fathers elder sister aged 80+ still alive and her husband passed away within 3 years after their marriage with out any children. They had a property in kanakapura and the will was in the name of my father who was the caretaker and he passed away in the year dec 2015 also my aunt was staying in her sisters house and when their family went to Qatar trip for a month later my younger brother had an opportunity to take my aunt to kanakapura for further proceedings to transfer the will in his name from my fathers name in the year April 2017 without even my concern and till today all of my aunt bank account is being monitored by my brother himself. When my father was alive he had told us to share what ever that comes from my Aunt property, now when i asked my brother saying why did you do the will on your name, he says it is none of your business and he also says dont interfere in this matter. My aunt is very soft and innocent and she doesn't even know what to do on this matter. Please suggest me further as i do not have any documents handy. Waiting for your earliest feedback.