Oh, and Rob, just to clear up future questions:
Jack and Claire were half-siblings, they share the same father, and Jack is Aaron's Uncle.
Kate is not Aaron's real mother. Claire is/was.
Claire and Charlie were in love and Charlie acted paternally toward baby Aaron, but Charlie was not Aaron's real dad. A guy named Thomas is/was.
Michael was Walt's dad. Walt's mom was dead. Michael is probably now also dead and Walt lives with his grandmother. Despite spending some time with the Others he is unrelated to Ben.
