Do Daughters have only one third right in property

Hello sir...I am malayalee christian. My father passed away in 2014 leaving behind some loan for his medical expense and business expansion. He has 3 property,a house in mumbai,shop and a plot in kerala.my brother &his family stays with my mother in mumbai flat and he runs the shop too. I gave 5 lakhs plus took a loan of 7 lakhs to help the plot to be sized by bank after my mother promised to pay me 32 lakhs including 5 lakhs i had paid and will take care of the emi against 7 lakhs when i said i dont want the share of the house or shop...now she denies the same and is saying that she would pay me amount left after she clears all the loan and is not saying about the property in mumbai that is shop that my brother runs or the flat they stay. They had given certain amount during my marriage so she is including that amount in the property share. Would that be right...as per my knowlegde my father has not made any will...i have a lawyer but she is not interested to talk my mother as she keeps on changing her statements after we sat for mutual consult. I work in pune in multiple shifts and brother he runs a shop of my father and paying of the loan from the money he gets through it....my ask here is how should i proceed. Since my mother is against me supporting my brother completetly..its been 4 months that they had paid the emi which i have to pay now..if i loose my job i would be able to pay my loan on the house i stay or the loan i had taken for them