When boosting saturation with portraits, be careful with skin tones. They're easy to over-saturate.
As it is, there's a green line coming right out of the top of her head. Next time, try using the background to frame her face/body, by having lines around her, not through her (and especially, never, ever straight through the eyes).
As for focusing on the eyes, it's usually best to use your centre autofocus point, get AF lock on the eyes/iris—especially when using a shallow DoF, like f/2—then recompose and get AE lock (unless you're using a flash, in which case you should be shooting manual. If you can't get them to stay still, use a longer DoF to increase your ability to get the eyes in focus.
Also, I'd like to know what focal length you shot that at. It's more flattering to the human face to shoot at long focal lengths, in the telephoto range.
Regardless, you caught her in a great pose, which is half the job.