Ayahiko stopped being nice to Mayuko a long time ago before marriage, cheated on her, didn't even complement her although she still loved him. Even mentioning Haruka made Ayahiko mad.
Looks like she was broken a long time ago.
I'm having a bad feeling the editor will be in trouble, she seems to be interested in Makoto and Mayuko will act jealous, something she couldn't do because Ayahiko was more abusive, couldn't "step out of the line"... yandare mode, active.
Thanks for scanlation!