P
Platy
Guest
If she was asked to sit there by the captain, that it no problem at all. The captain or PIC can authorise someone to sit in the seat. There isn't spare flight crew sitting around to take over. It's then up to the Captain or PIC to justify why.
I would assume that you are entirely correct in that the onus is on the Captain. Either way, it's hard to imagine taking pix as being justified as part of performance of duties so Captain may be the one to do the explaining (if permission was indeed granted).