Posing: in the above shot, her shoulders are pretty square to the back of the camera, which is "static",and you want "dynamic". SO...Turn her body away from the light and create an angle to the shoulders in relation to the back of the camera. Turn her head cross-body (creates dynamism and shows a feminine bosom), and back toward the light. That's a basic way to make a woman look slimmer, more-active, more "alive" on film. You need some angle to the torso/chest/shoulders.
In this shot, the widest expanse of her face has the light sweeping across it, which widens her face out: that is called broad lighting. She is broadly-lighted, which is good for making a face look wider.
Ideally, she should be more centered in the frame, and her eye direction has a LOT of "eye-cut", and is angled across to the short side of the frame...you're showing us a side-eyed look...
Ideally, sit her on a backless stool, have her lean forward from the waist, then pull her shoulders back, with the bust up and out, a super-perfect type of posture; this looks GREAT on-film...her posture is not good, her body is not "under tension"...
If you want to know more, Google the Zeltsman Approach to Traditional Classic Portraiture.
The on-line lessons might seem dated to those who do not understand that, for thousands of years, we've refined the BEST ways to sculpt,and pose, and model. Actors know this stuff...top models know this stuff...trained classical photography artists know this stuff..
Here's the complete course:
Zeltsman Apporach to Traditionla Classic Portraiture