nah, another question lots of fans want answered but dont think it weill be
from Lostpedia
How Libby got from being a patient in a mental institution to giving Desmond her boat and ultimately ending up in Australia was originally intended to be explored in season 3, but was not. She was then slated to appear in multiple episodes of season 4 to finish her backstory, and it was stated that those speculating she worked for Widmore were "barking up the right tree."
Unfortunately, the writer's strike of 2007 interfered with these plans, as well as the flashbacks of Faraday, Miles, and Charlotte. Unfortunately, as of 2009, mid-way through the second-to-last season, Damon and Carlton felt that they are done with Libby's story. "We feel like we resolved Libby’s fate, and for the fans that are still obsessing about Libby, maybe at some point someone will write sort of a 'Star Wars'-like novel about the story of Libby, but we don’t consider that to be a major story thread for us." Damon later said Libby's portrayer Cynthia Watros was either unable or unwilling to come back to finish Libby's backstory post-season 4 and that they felt it would be cheap to finish it in an off-hand comment from another character. They later revealed in an interview the reason for her being in the institution was her going mad after her husband's death and that it will not be explained without Cynthia's presence.
from Lostpedia
How Libby got from being a patient in a mental institution to giving Desmond her boat and ultimately ending up in Australia was originally intended to be explored in season 3, but was not. She was then slated to appear in multiple episodes of season 4 to finish her backstory, and it was stated that those speculating she worked for Widmore were "barking up the right tree."
Unfortunately, the writer's strike of 2007 interfered with these plans, as well as the flashbacks of Faraday, Miles, and Charlotte. Unfortunately, as of 2009, mid-way through the second-to-last season, Damon and Carlton felt that they are done with Libby's story. "We feel like we resolved Libby’s fate, and for the fans that are still obsessing about Libby, maybe at some point someone will write sort of a 'Star Wars'-like novel about the story of Libby, but we don’t consider that to be a major story thread for us." Damon later said Libby's portrayer Cynthia Watros was either unable or unwilling to come back to finish Libby's backstory post-season 4 and that they felt it would be cheap to finish it in an off-hand comment from another character. They later revealed in an interview the reason for her being in the institution was her going mad after her husband's death and that it will not be explained without Cynthia's presence.