Interesting thoughts all above! I would like to think, the kid was neither Aaron nor Jacob. I have no good suggestions, who it could be though. Maybe someone they killed or rather tried to kill? Young Widmore perhaps? MIB himself as a kid?
There have been theories, that MIB has been the one to impose as others, like when young Ben first met Richard, it's been said, it in fact was MIB, or Ben seeing his dead mother was MIB. Is MIB scared, because he can't understand, who could do impersonating other than him?
At this point Jack and Sawyer in the final scene could very well happen, but then again not, if the island ends up lying in the bottom of the ocean!
Claire's boyfriend and Aaron's dad is Thomas, an artist. He left Claire in the beginning of the pregnancy.
