"Strangers on a Bus", Jack Skillingstead

SS ASFM (Asimov's Science Fiction) December 2007 - science fiction
A man named Neil strikes up a conversation with a woman called Freya on a Greyhound bus. He tells her that he sees stories in the faces of strangers, embellishes them, and the people become what he makes up. She isn't sure what to think, but she's got to admit that he knows way too much about her life.

An interesting story, although it sort of made me think of The Lathe of Heaven by Ursula K. LeGuin. If I was this woman, I doubt that I would have remained calmly nearby to hear the entirety of this man's tale.