Share under mother property

I am married it’s 3 years now, I am 34 years, i have two elder brothers, one got married another single, two sister got married. My father not there, my mother stay with my brothers in her own house, present she own one property which is 1 crore worth, she want sell that property and give share to brothers 35 lack each and me and my sister 15 lacs, elder sister don’t have share.. I asked for 20 lacs which she denied to give me, till 34 years I am the one who looked after family, brothers were not working properly they don’t have any frequent monthly income, some months they do and some months they won’t., till now my mother said she give equal share as I took family responsibility but now denied, I m also not owning any property, I planed to buy home with my mom given share., my husband work in private organisations, he too don’t have any property.. I have two small kids. I am worried about they future, my question can I demand legally my share with my mom, do I have that right, can I stop selling her property until she give my share.