Property sold by father-in-law & Mother-in-law to elder son wife or (Daugther-in-law)

Dear Lawyer, I am elder son and married with 2 kids. I have one younger brother, one elder sister and one younger sister. All are married and had kids too. My father has self owned property land of 9 acres and in that i was the only one who is taking care of my parents and taking care of agriculture land with all maintenance. My younger brother was not invloved in any of the property related issues as he know that we are in losses and lot of debts in our property. But down the line after few years property has been sold to us and paid some lumsum amount paid in lakhs to my parents and also completely by writing the documents in my wife name with all legal documents signed by my father and mother in 2014 and right now has legal documents given by registered officer. So far good with my parents and they are happy too for the property sold to me. Right now there are no good relationships with my brother and myself and parents since 2011 In future will there be any problem from my brother or sisters related to property issues. Please suggest your valuable inputs. Thanks & Regards Suresh