User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-86.33.29.76-20130215150136/@comment-3146930-20130215192647

She vowed to try her best to keep Percy safe back in The Sea of Monsters. That promise doesn't really have a time limit to it, so if she doesn't try her best to keep him safe, the River Styx could punish her somehow.