I need christian advise please?

[Star]

1. as a person, your sister has chosen to be what she is. Freewill.
2. she is 16, she is normal, not under influence of drug, spell, satanism, etc.
3. means she is using her FREEWILL to be a whore
4. means neither parents nor siblings can change her into something she isn't.

you are clearly different from her.
its like cain and abel ... both come from the same set of parents.
one evil, the other good ... freewill

i can u/stand how upset you feel ... but you know, we just have to accept the people we love ... the way they are. If she were a friend, i would advice you to cut off all ties BUT this is your own flesh and blood.

Love her, do not judge her.
accept that if she choose hell, you must let her go, when death comes.