Brothers wife torturing during last month pregnancy

I m 27 years and 3 years married and my brother is married 2 years before my marriage my brothers wife from the day of her marriage started forcing my brother to marry me with her cousin brother and as my family member thought she is thinking for good without any doubt we told yes and engagement was held in may after her marriage of 3 months then in august she forced to break this engagement because her cousin brother is characterless and marry my real brother this time my family has not listen to her and searched other boy and fixed my engagement in same November and then she started fighting on small issues at home with my mother father brother me my elder married sister staying nearby our residence my brothers wife started involving in her house also she started behaving like enemy after year my marriage date being fixed with tho boy of my fathers choice this time and she started commiting suicide pressuring my parents to stop this marriage as she is having exam we taught to do the same to postponed my marriage date but fews days later we came to know she is liying we marriage conducted on same date and then on every small big occasions she started visiting my home and talking all bad about me and my family to my in laws now I m pregnant she is also having son of 8 month till her pregnancy and baby she was normal but as she heard I m pregnant she came at my in laws house and started saying bad this time