Can parents have right on son's property

Sir, Firstly i want to tell you about my family background. 1) My grandfather & grandmother both are the government Employees (Retired) , they both receive a good pension from government , so they are living a good and healthy life, so they don't depend on anyone financially . They have three child (2 sons & 1 daughter all married). 2) My father & Mother are also government employee , so they also don't depend on anyone financially. 3) Now my uncle (Chacha ji) is in private job as manager in a good company, Earning handsome salary,My Aunt (Chachi ji) is also a government employee. Now my question is that can my grandparents have rights in my fathers property ? i am asking this question because my uncle is playing dirty politics in our family he always mention himself as a poor guy in front of my grandparents because he has a private job not a government job like my father , so because of this my grandparents since from my birth they throw my parents out with me from our ancestral house and now from 27 years they are living with my uncle's family . Now after 27 years i m a successful guy i m also earning a good salary in a private company , but now my uncle is playing another dirty trick he always ask my grandparents that now they all are earning very well (My family including me) so please ask for your right in your son's property. Although we don't want there property. we all are very happy with our little happy family and want to be happy , we are happy with the assets we have with our hard work , we don't need anything from anyone . So please suggest me how can i save my family from my uncle's dirty politic because i have seen my father since from school age how hard he has worked to have the property that he have right now for my marriage and bother's education. Please Help me out from this solution because my father is already a heart patient because of my uncle . I don't want to loose him . Please help with a positive reply.