I think there was a brief comment in Reap the Whirlwind that mentioned that Eve felt some regret over her actions after losing Kane as well, and they had made some progress toward reconciliation. Don't worry, though. Kane won't be gone for long.
I'll admit that the house played a much bigger role in an earlier version of this book. The last time it was published, however, I had an excellent editor who suggested that subplot distracted from the main story line, and since it was basically the C-plot of the book, he recommended I remove it. I loved the story though, so I brought it back as a short story called In the Angel's Keeping. It'll will follow after the conclusion of All Lost Things. You can think of it as a direct sequel to this story.
Thank you! I promise there are some real clues mixed in amongst all the red herrings...but that's all I'll say.