Re: no backbone?
Gloss...like Reha said, this is only the beginning. So just recite your duas, grit your teeth, and be patient.
And do not allow yourself to be baited.
Let your sister and BIL make their threats. I highly doubt any of their attempts at slinging mud will be successful...in fact, I'm pretty sure that any dirt they try to fling on you will only come back on them. Because according to everything you've said so far, they aren't exactly saints. You have explained that your sister hasn't helped you and your mother out since your father passed and she got married. You told us that your sis and BIL have interfered with your time with the kids in revenge for petty things. Your BIL has gone through private texts and said embarrassing things about you. You BIL and sis didn't speak to your mother for 2 years over another petty issue. They go to all lengths to make someone miserable against whom they hold a grudge. And so many other things that paint them in a less than stellar light...
Do you think people are blind? Just because they don't say anything, it doesn't mean that they don't notice. Trust me, if they have been doing all the stuff that you say they have, people aren't stupid. They've picked up on it. So if your BIL and sis are going on a campaign to defame your character, it's not going to be easy. Because people know you, and they know them. They know you mind your own business and have a good reputation. And they know that the exact opposite is true of your sister and BIL.
So keep to the high ground. Don't respond to their verbal attacks. And don't say anything bad about them in anybody's presence...that too will speak volumes about you in front of the community - the fact that you are keeping a dignified silence and they are trash talking you at ever opportunity.
And most of all, look to Allah SWT. For He sees everything and He makes sure that the truth will out and that every one of us get precisely what we deserve.
You are right, people do know me very well, infact I know I am often used as the good example! everyone refers to me to give examples of how well I have turned out, helped family after daddy passed away, finished education, got decent job, have my own house etc etc etc and that is precisely the reason why it worries me, I dont want my reputation being tarnished in any way.... I am worried that my silent might be mistaken for something else.....everytime baji and BIL come over, they are shouting at me, and I mean physically shouting and screaming, its like they do not know how to have a civilised conversation like grown ups....I have tried speaking but they shout over me so I have given up... even today I just sat there silently and let them shout at me, when mum tried to defend me, they even shouted at her!! It made me sooo angry :( Its like if i try to speak, its pointless because they dont listen and if i stay quiet they still continue shouting!!