Self-respect. Let them know whom they are dealing with
Have a self-respect to you. People tend to get the most out of you. Parasites they are. And the closest relatives are mostly. Put them in the right position in relation to yourself from the start. That attitude is coming only with a good upbringing. Though, sometimes people are naturally born that way. If you don’t do that, they will suck up everything from you. Starting from a bank account, ending with ideology and views. After there is nothing left, you can go home, if its still there. If not, they will still dig out everything from you, especially the closest ones. Everything that belongs to you, till you die, try to be sure that there is nothing left for them. Parasites will face their justice. After that you can see their truthful relation to you. It is always important to have a self-respect.