Property

Sir, We have a anscertor property in bangaolore 1100sqft out of which my anuty and my father are owner out of which my brother has made release deed with my aunty of 50% of shares in property and balance 50% of property of my dad (we are legal hires of 6 members) but my brother has decided to built the house by amalgamation of the property by building g+4floor . in this case my divorce case is their with my husband also. so he is telling to realize my share on others. since my husband will come. My question 1.once i will give release deed i will not be the owner of the property any moreover. 2. amalgamation of the property. who all will be the owner and all the share holder will have equally rights in property after construction and khata and right to sell the property once constructed. 3. and tax paid receipt will be got by the bbmp 4.or only my brother after amalgamation will be owner of entier property 5.should i make and give release deed to him kindly help sir because because our parents are not alive and my brother is forcing all 5members to realase and he will amalgamate.