That's a pretty big generalization bb, and not one I agree with. How people handle the marriage in fic has been very interesting, ranging from the au (they never married/they divorced) to Katy as a saint who steps aside for them, to Katy's a bitch and Kris leaves her and, finally, to the ones that treat Katy as a complex individual who loves Kris, adores Adam, and is caught between them. They don't all end with Kris leaving her, either.

There have not, to my knowledge, been any fics in which she invites Adam into the bedroom to get it out of Kris's system and keep him home. That's what I would love to see, especially if it were as well done as this is.