I think Dragon just met a lady there while he was in the area. Maybe a childhood friend of his or something. Regardless, we know that Luffy was born in Foosha village and we know that Dragon was from Goa. So I just don't know how Luffy's mom could be anybody important, as apart from Sabo and the Monkey D Family, there just aren't any other important people from that area.
I think if Luffy's mom has connections to anybody, I'd say it would be Makino. She seemed to kinda look after luffy, so it would make sense if she was his aunt, or at least was friends with Luffy's mom.
I think if Luffy's mom has connections to anybody, I'd say it would be Makino. She seemed to kinda look after luffy, so it would make sense if she was his aunt, or at least was friends with Luffy's mom.