User blog comment:IamJakuhoRaikoben/Chapter 450: Alone in all the World, Review./@comment-24.200.220.241-20150831051229/@comment-3290324-20150831051959

Few things:
 * 1) I don't think that's her sin.
 * 2) I'm pretty sure Makarov already knows
 * 3) And the dude is in his 90's. I doubt he's that invested in his mother whom he never met, lol