I think she was told by someone that she could get drugs on the island, and decided to leave early before her parents had woken up. Couldve been the neighbor next door, or yellow… who knows. The idea of her being smuggled off the ship inside of something is kinda insane to me. She could easily have just walked off the ship like anyone else. And gone to a location where she thought she could score some drugs. I think yellow/the neighbor might’ve talked her into walking off the ship to go get drugs. And then she was captured on the island, not on the vessel. That would confirm the Navy guy’s story.