What do you think of me being upset because of having to pay for my sister?
Oh wow, seriously, you have to pay for your sister? Why is that?
Because I'm the only person of my family who makes decent money.
I get it, it must be burdensome to provide your sister too. A the end of the day she still is your family so you have to help her.
I can't do nothing, she's family and my sister.
That is upsetting for sure. Paying for others just because you have more money doesn't mean it always has to be that way. Make sure you never tell anyone how much you make, that way no one has to pay for anyone else.