[Something's definitely off here.]

I don't know who told you that, but they're wrong. I opened the spirit portals by touching them--only the Avatar can do that.

[There, she'd said it, but now that Korra's putting some of the pieces together, she isn't liking the conclusion she's getting. Neither of them have heard of the locations they've named, and Al hadn't reacted to her name at all earlier... No, she isn't liking this at all.]