BW. play the nice card to all. For the sake of peace. We all have to do that from time to time in our lives. I still am.
You are in the same situation of tiny Switzerland during the world war that of having to please hostile neighbours but remain true to yourself. Please consider the immaturity of your siblings when thinking of things and planning the next few years of your life. Do you have a part time job? then stack your funds away in your own bank account and be very circumspect as to who and what you spend any of it on. I gather you are young so do all you can to achieve at school. Education like health is everything.