Share of married daughter in her fathers property

Hello sir.. This is sree here. I completed MSc..Now waiting for PSC appointment. Im a married woman,29 yrs old with 2 daughters. My parents are alive. Father is a Rtd Govt officer. My mother is a reputed govt officer..still working. I have 2 younger brothers. Elder one joined B.Tech in 2007 and havnt completed B.Tech yet. He quit it..wchich means his qualification is plus two. Younger one doing B.Com 2nd year. Sir my problem is....my parents are not in favour of girl child...even from childhood onwards they treated me inferior to my bros. They buy costly things for my bros n cheap things for me. They joined me in a govt aided school...low fees..but joined my bros in high class schools.. but things didnt go well..they bacame lazy..n i became studious..i secured first rank in my degree level..but my bro failed in all his btech exams...he could complete..i entered my classes through merit..without or low fees...got scholarship from ugc. but my bro joined btech by giving donation n high fees...around..4-5 lakhs. younger bro also studying in management quota. today my problem is mental torture by my elder brother and parents.. nw my bro is 27 years old.. they r living in my fathers self acquired property...enjoying everything...house...cars..bike...electricity..water..electric equipments..money for their needs...they r enjoying life with my parents wealth. but i am really struggling...they havent helped me when i delivered my 2 babies..they didnt gave any help after my marriage..n they r talking like whole their property belongs to their sons..my marriage was a simple one..which costs around 7 lakhs. one day when i visited home my bro asked me about the cost of my marriage...he told it was 12 lakhs...another day he told it was 15 lakhs...n another day he was telling that it was around 16 lakhs...day by day hes increasing it...my parents spent for my marriahe not my bro.. so mny mental torture by him...im totally exhausted.. can i stop his mental torture by any law/? can i claim share in my fathers property.? do i need to give back 7 lakhs?.my relatives know about my bros character n no one has any contact with my family now..