User blog comment:FairyRaven/Fairy Tail Chapter 467: Mother's Key, Review and Commentary/@comment-1359322-20160104115124/@comment-25111584-20160104120258

Loke was present in Earth Land without an owner for a pretty long time. With the CSK's permission, humans can easily enter the CSW, so the opposite can be true too (and screw the time constraints :P). Plus, we've been told that Lucy's Spirits can keep track of her actions to a certain degree, so somebody could have just told Aquarius. I don't really see the problem; wouldn't even mind it if we don't get any explanation. ._./