User blog comment:Monkey.D.Me/Whose baby is that?/@comment-90.52.105.169-20110616190444

I made up my own story about that. Since in the coloring I found the baby turned out redheaded, I imagined that it was Shank's 'illicit' baby that Makino is taking care of... In any case, I seriously think that she's just looking after him and that he's going to become a redheaded copy of Luffy.

Haven't you seen how history seems to repeat itself in One Piece? I can almost imagine the kid working under Luffy like Shanks did for Roger... In any case, I think the explanation will come some time in the future.