I find it odd how Esther poses in that photo perhaps taken by the stranger. She looks extremely comfortable in the photo and it's not how I would pose when being photographed by someone I barely knew.
I went up Sca Fell (highest mountain in England) on my own in the summer. A stranger took pictures for me at the summit, and I took some for her. I look pretty happy and comfortable in them. You wouldn't know a stranger took them. I was pleased to be up there, didn't care what the photographer thought!
So I could easily see this scenario happening.