I don't normally advocate what LB is suggesting, but in your case, I agree here, it's better to deny. Why? You were already lying to begin with. I know this doesn't sound good, but I figure this will better suit your long-term goals, i.e. your college education. If you get Df'ed, your parents will withhold any financial help from you. And like Puff says, you live the life that many JW kids would kill for.
But you can convince the elders that your sister has the problem...dity mind, hearing problem, whatever, you not only keep your parents' cash coming in, but you also teach your sister a lesson in loyalty. Believe me, it's better she learn it this way rather than lose her sister to a bad case of verbal diarrhea
Sometimes you must comprise your morals for the sake of the larger picture. Like I said, I don't normally advocate this behavior, but you have more to lose than your sister.
Take care,
the dustrabbit
To do list:
1.Still waiting to goose the Organization.