User blog comment:LordLuminous/Fairy Tail 491: Mother and Child Review/@comment-130.105.225.146-20160628081845/@comment-7418318-20160628084605

The reason why she cast Universe One was to get Zeref to Fairy Heart and Acnologia in a position from where he couldn't interfere with Zeref's plans.

And on top of that she repeatedly stated that what she did was for Zeref.

Why would you think she's gone rogue?