LOST Revisited: 6-5 “The Lighthouse”

There was some debate as to whether Jin knows where Aaron is or not. Later on, it’s pretty clear that he does, whether or not he wants to admit it. I don’t believe we ever saw a scene where somebody explained to Jin that Kate was raising Aaron, but there were a few days when Hurley, Kate, and Jack lived among the Dharma Initiative. You have to assume either Hurley or Kate said something to him in that time.