Yes, she's abandoned her book on the chair in favour of a rather self-consciously cute pose in front of the glass. I think the clue may be in the rose that's lying next to the book -- sent by an admirer (secret maybe? or not) it's taken her mind off reading and on to wondering how best to look at him next time they're face to face?
As far as I know this is called 'Girl Looking in the Mirror', and it's by the Belgian artist Alfred Stevens (1823-1906) whose work has appeared on here several times before, most recently here.