About dont want to take divorce from husband

My sister marred in 2011, in Dec 2017 both went to family cort and that time both decided will live together . Now from last 9 month husband , him family member touching , When she was pregnent she don't want 2nd child as already lot of issue ongoing but husband told if you to live with me then you have to go for 2nd baby , and after 7-8 month of bady he told if you to live with me then you miscarriage the bady , and for that you go to your home and do , I will not give any sign for that and now she is good with health bady , but after that they started behaving like it's not my bady , I can't take care and I need divorce from you , And from last 4-5 days he is behaving very cruel and I am very fear . As I am having one child of 3 years girl and other one is just 3-4 month, right now I don't want to live because of child Husband told me he will sent the divorce notice in 4-5 days , I don't know what to do. Also he is asking money to me to take from parents what ever I spent forbirth