Family and Husband mental and physical torture.

My mother in law is very dominant lady and controls all acts and family members in her family. My father in law and husband cannot go against her. Every time she comes our home creates issues and leaves with fighting. After they leave my husband and my relationship becomes bitter. From begning she said bad about my religion, as our was inter religion marriage. When I was pregnant she came my home at time of 9th month and treated me very bad like pushed me, mentally torture me and abused me. My husband never took my side. It's been 8 years I am bearing this torture. Now my son is 5 years old. She recently came and created screen again in front of my son she use very cheap and vulgar language about me. My husband never say her anything. This time she crossed all her limits, and when I am denying from going their home my husband threatening me that he will take away my son. I said I will commit suside if he take my son. As my mother in law is very cruel just to maintain her image in society she will not fear from killing my son too to take my revenge. And my husband is his mother puppet. What action to take as I am getting mental torture, depression daily by in law's and husband. It's because of all these issues I lost my good pay job and I am job less. Now they dominate me more. I feel like commiting suside, I am living just for my son. As he see all this as is becoming violent like my husband. My in laws talk to my son separately on video call not in front of me and are doing his brain wash too. Please help me and guide me. My husband threatened me he will take my 5 years old son to his parents. And force me to beg pardon from them for all things I didn't do. When I said I will die but not go their home nor let my son go. He said "abhi Marjan, meri Bala sai".