She is his caretaker because he is mental. Naomi calls him a 'head case' The tone his caretaker uses when talking to him is the tone people take when talking to someone who is crazy.

I only watched the first five minutes of the enhanced episode and that statement caught me completely off guard. I figured this was Daniel's wife. I never thought that was his caretaker - I think this is a big clue. Could his connection be to Hurley even? They could have spent some time at the same institution.

Also, my wife talks to me like that all the time. Crap. I should be worried. Although, I am crying for no reason all the time too.