Mental harassment from mother in law

Hello Sir/Madam, I am married since November 2009 and have a baby boy who is 4.5yrs old. I am a hoisewife. My mom in law 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 office 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. I m really very helpless as I hav got a small child to take care of. Mere parents be dahej me kuch bhi diya nahi hai... aur mere devar ki shadi me meri devrani ne bahut jewellery layi... aur hamesha mayke se kuch na kuch lati rehti hai... aur me kuchbhi nahi lati is liye harass karti hai meri MIL... Aur husband bhi hamesha me hi galat hu aise dikhakar kuch bhi bolte hai..... 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....pls call me at 9am