I got that impression as well.
About Noriko telling this to Niki. I wonder if Maya and Niki ever have an encounter, would Niki say something to defend Noriko. If so, I wonder if that could cause Maya to lose it and start spouting truths. Probably not, she keeps it all in. But what could cause her to crack in that regard, anything?
I think New Maya is a very fragile cat. Our Maya had the
certainty of being with Akira over thousands of years. They had something which not one of these girls could ever possibly have (from her perspective), and that fueled her strength. She really had no competitors, including the memories of Sekai. If not for the world fucking them over, she might even have made him an honest man during the cycles.
New Maya though is a girl that bet her entire life on a broken adult male, like literally abandoned everything she ever was and put all cards into this. Think about it for a moment, we know how Niki loves Akira. But has Niki abandoned her entire life, cut ties with everything, and moved in with Akira while at the same time having to maintain that relationship a secret from everyone? Only Maya did this, and she did this while being a kid. If Akira ever dumped Maya she'd have her entire world erased, that's how fragile of an existence New Maya has.
So I think that New Maya is terrified of Niki, and with good reason - cause New Maya doesn't have the backing or memories of being his chosen guide, actually she never went against Niki, at most she went against Noriko. And she has no reason to believe she'd win against Niki either (you can see how logical it would be for him to trade her over for Niki in their conversation - from her perspective - and how close to breaking that makes her go).
So I think anything could make this New Maya crack. Will Akira cheating on her with half the class do it? I think it will to a certain point, remember that in her entire life with him he was completely faithful to her (or so we've been led to believe) - unfortunately for her, she's worse than Niki in this regard. She can't do anything to force his hand, and she is no one outside of their relationship. It really is a desperate situation to be in. I've mentioned this before, but from the moment Akira entered a romance with Wizard Maya, he not only stopped being solely a victim, but he became responsible for her for as long as she wants him to (we just never felt that weight because Maya Prime was in control, yet this one isn't and is about to be crushed).
Dark times ahead for the little stray.