I set my camera to take action shots with a very short shutter speed, so I could freeze movement and water droplets from the horses ride in the shallows. - Unfortunately, the sky was covered with a milky layer of clouds, but you can not have optimal conditions every time.
Here are some of the results of my spontaneous collaboration with the riders and their mother.
In fact, I believe that the two girls were friends and not sisters.
A very pleasent evening on the beach with the camera ended with the above shot of the two sweet riders in the dunes. - They get some free images, and I got some experience in shooting action photos. A win-win situation.