Family issues, alimony, child maintenance

Sir, we got married on november 27 2015, love marriage belongs to same caste. My husband working as a policemen. I live with my husband seperately with him, from that day my mother-in-law and entire family create problems for me, and my husband also joint with them and they torchered me physically and mentally, in my 1st pregnancy in 2016 they always tell lie to my husband and triggering him and my husband beat me with that police stick.. My husbands family always insult me and my family and making rumours that me and my family are bad in front of ours relatives, but my mother-in-law complaint that my family insult them in front of others like this she manipulates everything and triggers my husband, when i'm 4 month pregnant my mother-in-law cornered me to eat papaya to abort my baby when no one in home, my mother-in-daughter plays major role in all problem, i'm second daughter-in-law, 1st daughter-in-law is her own brother daughter, so what ever good things happen that girl have the 1st right, bad things happenthey tell bcoz of me, my husband have a sister and a elder brother they both have no babies, his elder brother got married before 13 years. Before my marriage my mother-in-law compelled my husband to give baby to her 1st daughter-in-law, bcoz in front of the society they were got insulting for not having baby, but my husband refuse that time, but now she got pregnant and give birth to a baby, by her husband have no sperm counting to get a baby. Even after my marriage the entire family create problem to get divorce between us, always my mother-in-law make my husband to speak with that girl, make him to spend time with that girl, that girl is innocent.. My husband also having many illegal affair relation ship with some ladies.. From 2018 july we live seperately bcoz of their family.. While seperating i'm in my 2nd pregnancy 4th month, till now my husband didn't give any money for my expences, he didn't see our 2nd baby now he is 8 months. My husband replecates what his mother speak.. The problems i have told is little, more problems are happen by physically and mentally by my husband and his family.. They even not allow me to live calmly for a single day, me & my family never spoke to them, they create many problems till now and blame me that me and my family did that problems to them, and trigger my husband. He or some one in their home come infront of our home and scolding, insulting us in our street infront of ours.. Plz help me.. What can i do them legally for spoiling my life. And my husbands gross salary is 27400 how much alimony and child maintenance csn i get to run my life.. Plz sir/madam help me..