I only intend this as constructive criticism ... not to pick your picture apart. Please take this in that light, OK? 8-)

The pose looks very unnatural. To be a little more specific, the lower part of the body is facing one way, and the upper part another. Also, the arms seem very stiff.  The pose raises a question as to whether or not it is physically possible, but also raises the question about how uncomfortable it must be to actually BE in that position for an extended period of time.

So think about how a person would REALLY sit on the floor in front of a computer. And what positions would be comfortable to hold for a long period of time. Because it appears as though you want her to look as though she is really concentrating on the screen in front of her.

Here's what I'm thinking. Being that she is in front of a computer, there are probably two postures that would be taken ... either sitting with legs crossed over each other, or lying on the stomach. Pay attention to each body part as you pose it, and think about the limits that each body part has in bending, twisting, or rotating.