Think about arranging the shoot so the horizon line (ie the skirting board) is horizontal. With the support at an angle it sort of feels to me like you're off balance. The camera also looks like it's at the height of your breasts, so the viewer is also, impliedly at that height (making your knees look slightly larger). Consider the camera at (the model's) eye height (simulating a viewer sitting opposite).
To everyone saying shes just doing this to show off, not really, if you can't appreciate the human form and how beautiful it can be youre probably 12 years old and need to grow up. When I see these poses I'm just amazed at her form, as everyone has said she has amazing hips, very very rare, its beautiful when you catch something so rare.