A photo of a woman in a black coat standing in front of a large two-paneled photo depicting a woman in a gray dress looking down with her hand in a bag.
The woman in the two paneled photo is the other woman's relative
A woman in front of a photo of a woman is assumed to be the other woman's relative.
The woman in the photograph did not necessarily have to be a relative.
The woman could be looking at a photo of any other woman, not necessarily her relative.