Self Accuired Property

I am looking for a legal opinion on my rights over my parental property both ancestral and self acquired. We are one daughter and two son for our parents and both married. One of My Brother Has died. And Old Parcha has written in my share . Parents are not alive also i am resing since 40 years in same place after marriage. One late brother legal widow and their two sons feel that daughters have no rights over the property and other one brothers who is alive have no objection and hence I am contemplating a legal recourse. I have read the Succession act 2005 and understand that I have equal rights on both ancestral and Self acquired property of my late fathers as its received by way of gift deed My concern is whether my parents can adopt measures like disowning me just to nullify my claim, what is the legal implications of such disownment on my claim if the scenario arises, and what are reasons they can cite for disownment. Just for your information, my marriage was arranged. What would my share of the property as compared to my brother Kindly advise