I can't remember if the mc mentioned Kath divorced to be honest (I remember he saying that she got married to Aiden and that he lost track of her at some point).
Alyvia after divorce the glasses guy (Dylan I think?), she got remarried. I'm not wrong the mc said that her second husband wasn't much better from the first or something like that.
Not sure if Emily had that much of a happy life. For what I caught she basically became an Ice Queen with a lot of bitterness in her(? But maybe that is from the point of view of the mc and how she was when he was present.
And from the secondary heroines... I don't remember if anything about them where mentioned.
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It would be cool at some point, maybe as an "extra chapter", a glance of how is the life of all the heroines in the future