User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-76.248.82.146-20141121025407/@comment-172.56.38.29-20150308224911

I think Mavis could be natsu mom which is how zefer know him because he says "you've reall grown" which shows that he met natsu as kid, then gaved him the power to stop but told Mavis to take him to dragneel to teach him dragon slayer Magic then she froze herself to be awaken when time come and she hidden under guild plus shows how macarov knew where to find natsu or brought to the guild