Aside from the lighting, you might also want to watch her head tilt. She is leaning it back and it makes her look down her nose at the camera. You might find her more engaging by dropping her chin just a bit. Maybe get her face a bit more square to the camera and then tilt sideways. I also would like to see her eyes a bit more open to grab attention. I am quite certain she is acting very natural and when she smiles, she by nature squints. Yet I find myself looking for a bit more eye contact if she can give you that. The first one caught a better eye placement overall. If you can work with her to get her eyes a bit more open so they can be seen, I think you will see a dramatic improvement. Great location and your model looks very relaxed. Great work and keep shooting.