Can I claim share of ancestral property after if i am not in the Will?

My father-in-law had one flat and one house. After the death of my mother-in-law, my father-in-law got remarried. Under relative's pressure, my father-in-law transferred the will of his flat in my husband's name as it was previously in the name of my late mother-in-law. The flat's will was made in my husband's name by making it a gift will from my sister-in-law so that she cannot claim the flat in future. Recently, my in-laws shifted to their house after handing over the flat's will to my husband under bitter circumstances as due to my second mother-in-law's recent behaviour and politics, the relation between my husband and my father-in-law became bitter. Now, my second mother-in-law and sister-in-law are trying to transfer the will of the entire house which is now in my father-in-law's name to their name without giving any share of that house to my husband. As it is my second mother-in-law, will she able to get share of the property depriving my husband & sister-in-law?