petty water connection issue now becomes a danger for my mum

My mother was harrased by my father . we filed a case against him in delhi police station. He was put in jail, then.bailed. now we live in his house but his sister lives in the same building upstairs, one floor above.us. the.problem is we have a single motor connection. They do not let us use the water connection properly. They stop it, sometimes.we.have to beg them. we have daily quarrels with them. Its.just me 18, my mum and my.brother ,14. Still we fought are daily battles. But now things are going out of hand. My bua hhas 3 sons all of them in their 30s and having.children. in one argument they harrased my mom , all 3 of.them.n my mum was alone defending herself. As i.was gone to.college.and my.brother is too young for any help. My mother in anger called the police, went to.the.police station,.now my bua.also.called and complained.about.my mum abusing . my was already humiliated and.frustrated and then on top of that the police officer who handled our case didnt.bother to listen.to my mother. He even ill behaved with her. And my.bua being a.pretty women got all the brownie.points. so my.mum.lost her temper and hitted my bua with a paper in her hand in front.of.the.police.men. he was furious.and.agitated, i.understand she did wrong. But.now this case is.going to.the court and that policeman will handle the case too, he dosent support us, it is.clear. And he will.try his best to get mum down..im.scared that is there by any chance that my mum could go.to.jail? We dont have anyone.except.our.mum.. And she.is.scared.too. please help.us. i want to.know.if there is anything that can lead.to.her imprisonment? Because this is what my bua.wants.. A revenge.and they wont.stop. plz guide me.