I have a terrible mil.she hates me &says im good 4 nothing,im manipulative &says ive taken away her son.?

she holds me responsible 4 every wrong dat happens in d house.she doesnt respect her husband also &doesnt cook 4 him.im the 1 giving food 2 my fil also.he is silent &they both do not talk 2 each other.i live in a joint family & im d younger sons wife.my mil always blames me 4 my husbands faults also &she says its all bcoz of u.what should i do?my bil i.e.her elder son is also against me&a backbiter.he is the 1 filling her ears,but she loves him &is unwilling 2 hear against him.he is the ruler of d house.can i get some help?