You are a Muslim by religion then how do you think that Hindu succession act shall apply to your case.
If at all there was any judgment in this regard that may apply to Hindu laws alone and it cannot be extended to Muslim personal law.
Further since this is a property dispute between yor family members, it is your personal issue hence Sharia board cannot interfere in it. The staying outside the property jurisdiction cannot entitle the Sharia board to interfere in this mater or it has been conferred any such authority.
If they have filed a partition suit, it can be challenged as per law, further if a partition has not taken place how did you identify your share of property officially or legally.
Without proper partition you cannot identity your portion of property out of the entire property hence you have no option than to first partition the property and then you can sell your portion of property separately to anyone which she cannot object or interfere.