I should retirtle this thread, but I don't know how. Her actual words were "Can I get you to move"? in a very expectant manner. Its hard to transmit body language and demeanor over the internet. She was not polite, despite not being obviously rude.
If she had started by explaining politely "Sir, I've been asked to photograph this recently engaged couple in this lovely gazebo. Would you mind moving just for a few minutes? If not, we'll come back later". Then I would probably have gladly moved.