If it was my sister !!!
Bali is an island about 31 miles across. Now I might be watching too many movies but if it was my sister, daughter or wife I would raise up the money and bust her out.
It's a crappy jail in a 3rd world country. You could plan something out on Google earth and get it done. I mean people escape all the time from US prisons. Hire some bloody mercenaries.
WHY I THINK SHE IS INNOCENT !!
Because anyone who has ever possessed any amount of pot knows that a simple zip lock bag will not hide the smell. Therefore they wouldn't try to smuggle 10lbs of it into a country with the death penalty for it.
It is my hypothesis that the dope was either planted in such a way to be obviously found to take attention away from a bigger smuggling operation or someone simply made a mistake when trying to smuggle it in.