So, it's interesting that this book is written entirely in phone conversations. Barb was annoying at first, but quickly, I felt her deceit was justified. Jeff was face-palmingly frustrating. That kid is more shallow than a kiddie pool. It bothered me that Barb called him a friend at one point, even though she specified that they're only friends on the phone.
I like to imagine that Barb finally gives up on Jeff completely after the events in the book. He never learns his lesson. He seems to get a clue once or twice, but quickly reverts back to the same Jeff he always was.