I think they would regard me as a member by blood, as long as my dad is indebted to them, so they sometimes require me to do small jobs for them. This life is "normal" for me, but I have no real loyalty to the gang and don't consider myself part of them, just connected in a way that wasn't my choice. I don't call on them for help or make a habit of doing illegal things when I don't have to.
However, I don't especially hate them morally; if people want to join, that's their choice. Maybe when Juno first started approaching them, they asked me to vouch for her, that she wasn't going to betray them to the police or something. If you were clear, that would also give them a bargaining chip when dealing with the law, so bonus for them. Since then we've been sort of loose associates at school and elsewhere. Of course, being more embedded in the gang would mean they'll go a little further to protect me from the law and give me a little more leeway, and I would have a little more savvy about gang life, so I could be using that to help you: steering you away from really dangerous work, working with you to spread liability, etc.
If that sounds okay, it could make an interesting dynamic between me and your sister, where she thinks the best thing is for you to quit gang life and straighten out, and I think it's best that you be free to do what you want, no matter what. We'd sort of be conflicting mentors. But of course you and I are the same age, so there's no need for me to be a "mentor" of any kind rather than just an acquaintance.