I don't know what is the status of IRBM and wife share in Inheritable property but the only way not to give any single penny out of your inheritable property is conversion from Hindu to a Christian or Muslim.
As this applies to Hindu undivided family property and the day when you convert your religion then legally you have not right in that property and when you don't have rights then there is no question of sharing it.But of you already inherited the property then its your property and then there is no way out other than sharing so conversion of religion will protect inheritable property