Me and my child not safe in in-laws home.

Tell me the suggestion please. After my c section I came back to my parents home for care. My mother in law want me to work according to her. In her son absence she used to taunt me for money and for work. After 6 days of my c section she starts taunting me and she locked me in my room when her son went to office. In front of her son she show too much care but when her son went outside she behaves very weird and she never leave her son alone. Whenever we both spend time together she came between us, i can't told my husband about her mother. She gave water to my 14 days baby girls in my absence. I told her not give water but she did it. She don't hear me. And she told me to do house hold chores after 7 days of my c section. And she do some black magic things like vashikaran types. She made taviz for her son and told him that this is for black eyes and now my husband don't talk to me and he don't show any care for his child. What to do I don't know. How can I go back to my in laws house.please help me, one time she told me not to interfere in her work otherwise she will remove me from her way. Please help how can i go back to that place. If something will happened to me n my child then??