well, it goes to show she was being honest in Kyoto. She really did run away with Akira and became his "faithful" wife 100%, and a mother to Ami.
I also find it interesting that she's able to recognize that her Akira is entirely different from ours because yeah, hers would have grown up. I mean, he's not fucking Ami by design, neither Sekai nor Ami can convince him of things and he's become his own person. Even Makoto seems to have been his choice, rather than Sekai's suggestion.
They both seem to default to whatever he decides, and he seems to be in a much "better" place mentally (given that he refrains from incest), and has outgrown Sekai's influence to an extent.
Edit: minor note, I found it so funny that Ami basically becomes Noriko everynight, watching from the closet
such is karma