Abigail watched Katherine. She moved like a hunter, silently and slow as she followed her prey. If she hadn't seen the camera, Abigail would have thought Katherine was out to restock the island's food supply. There'd be fresh bacon for Finn. A picture might have its benefits too, letting her friend flex her photography skills on something other than the many island babies.
Abigail walked up behind Katherine quietly, keeping her footsteps light and precise as she waited for her to spring forth and take the shot. Then she'd feel free to say hello.