Aunt keeps on fighting and threatens us she will file fake court cases

My father provides my uncle`s family all the needs whole kirana, eatables, detergents, sopas EVERYTHING. We live in same house, uncle and out family together. whole kirana, eatables, detergents, sopas EVERYTHING. Still my aunt threates my father and uncle to file a fake court case against us, threates us that she will commit sucide and write a fake note and what not. She herself earns 60000 per month but never takes out her money, just uses it to buy expensive clothings and accessories. Please help me! my father stays at shop as he has to run our house