His sudden appearance startles Liz, and she instinctively steps away from him.  But when she realizes who it is that's appeared in front of her, her expression changes from surprise to confusion.  Isn't this the same man who'd just accused her of judging him by looks alone?  Why would he come to the library, especially to simply read aloud.<br/><br/>But perhaps he's attempting to reach out again.  She stands there, struggling as she tries to figure out what to do.  If he's come to try and work things out, then her distance might be seen as hesitancy.  However, if he is just here to read or for some other reason and she presses too much she might drive him away forever.  Caught in the web of choices she pauses, trying to understand the situation better.