The first shot has what we used to call "dead eyes", meaning her eyes have no sparkle, no catchlights. A suggestion would be to look into a flash that has two flash tubes: one that swivels and bounces, the other, a much smaller flashtube that points straight ahead, and provides a catchlight. Nikon used to make a flash called the SB-16 that was designed that way. Currently, Metz is the only manufacturer making a twin-tube flash unit. An alternative, if it works on your camera, is to use the shoe-mounted flash and the pop-up flash at the same time, with the pop-up flash dialed way down to like 1/16 power. A third alternative is to use a white, plastic spoon rubber banded or taped to the flash, so that a small amount of the bounced flash is diverted toward the subject. The fourth alternative is to use the small, built-in bounce card that many better speedlights have--you know, that little slide-in,slide-out piece of paper thingie...
Both frames were underexposed,according to the histograms, the second more so than the first. The first shot looks the most like natural window light, but her eyes lack sparkle...maybe you could have cheated a little and put a piece of *aluminum foil* inside the book,and gotten a bit of eye catchlight that way.
Just wondering if you've been able to deliver on those 10 Great Dates yet.