User blog comment:B214/Chapter 513: Hanamaru/@comment-24277053-20161205153713/@comment-7418318-20161205154211

Considering how Irene enjoyed playing with Erza both physically and emotionally, I wouldn't call anything she said "confirmed" just yet.

Remember that Silver also "confirmed" that he was Deliora and see how that turned out...

I won't be surprised if it is the truth, that she's Erza's mother, but I won't be surprised if she isn't after all either.