This kinda has me regretting trying to read all of Barbara Michaels' back catalog. The characters were tiresome & predictable, and while there were a few hints towards evil (spirits? a presence? the house? I couldn't even tell), it wasn't enough to explain away the villain's behavior, or the sense of "doom" that hung over Megan.
I would say at best, this could have been the secondary ghost story, like in [b:Ammie, Come Home|140403|Ammie, Come Home (Georgetown, #1)|Barbara Michaels|http://d202m5krfqbpi5.cloudfront.net/books/1348289627s/140403.jpg|2629158]. Maybe that's what [b:Someone In The House|1450937|Someone In The House|Barbara Michaels|/assets/nocover/60x80.png|135320] is about?