Sydney was clearly surprised when he explained what he was doing in space. He was probably the last person on the island that she would expect to be involved in illicit activities given how prim and proper he seemed. "I wouldn't have guessed you were a smuggler," she admitted. "It doesn't really fit with what I know about you."
Though she supposed if he was doing it to protect his sister, it would make sense. People often did things they wouldn't normally do in those circumstances. She certainly had and, despite hating the fact that she was indebted to Abe Mazur, she didn't regret exacting revenge on Keith for what he did to Carly.