My mom in law and husband harass me every day for every day

Hello Sir/Madam, I am married since nov 2009 and have a girl child who is 4 year old. I am a teacher in private school and also take private tutions . My mom in law and husband harass me every day for every single thing in the house, thereby making my life miserable. Actually my mom in law has major influence on my husband n he agrees to whatever wrong she says. Whenever he returns from college she creates one or the other scene and lies to him for petty issues. She tells lies to him and ignites fight/ arguments between both of us and clearly tells my husband, right infront of me to divorce and remarry. I m really very helpless as I hav got a small girl child to take care of. my hubby is in a college n earns more than me, he n my MIL always demand money from me. Though I always giv them my full salary and income earn by private tutions still he asks me how i spent all my earnings . He doesn't even lets me know where he spends all the money I give him he earn by his own salary. For the past 4 months I m staying with my parents. Please suggest what should I b doing if they want's to kill me or to forced to sucide I do not want to initiate the same however they are keen on it. They also threat me by saying that he will divorce and I won't get anything, be it money or our child. I m really scared and under severe mental tension, as I am scare of losing my son. Plz suggest legal implications in this matter and oblige. I will b very grateful to you. Thanks in advance....awaiting your legal advise....