Can I remove someone standing in front of another person?

You're going to be doing a lot of drawing/ painting in Photoshop to create the part of the woman that wasn’t photographed. 

You knew that, right?

If you like the image why not just extract a portrait of the woman [head shot]? The pose of her arms would look unusual if she's not holding something anyway. 

neilB

The photograph is a two dimensional image. There is nothing behind the little girl’s image. It might be possible to reconstruct what would be the missing area if you had images of the woman in a similar pose revealing the area currently hidden, but I suspect it does not exist. Bottom line: You are out of luck.