I don't believe for a minute that a sensible mother with a young daughter would invite a teenage boy, a COMPLETE STRANGER, to live in her home unless she REALLY knew him well.
A lot about this book was not believable but that didn't prevent it from being enjoyable.
KS's characters (in all her books) are always complex, compassionate, intelligent ... and troubled. In this, she is unbeatable. No one else gives as much depth to fictional characters.
I do wish Jace and Julia's love life would have been a little more detailed, however.
And (the reason for 4 stars), I wish KS wouldn't make those characters recovering from illness or accident SO sickly looking. I get it that they've been ill, I don't need it that explicit to where the characters look "skeletal" or have "paper thin skin", that sort of thing.