They were out there, biding their time and waiting for an opportunity. Master2 might be oblivious but Bear could sense their presence. So even though he was technically "off duty" Bear still maintained an alert attitude of watchful readiness.
Bear loved and would die for both his Masters, but Master2 inspired a greater protective response in him. This mirrored Master 1's own attitude, as Master1 would often hover protectively around Master2 when they were together, and would give Bear the "protect" command when he was forced to leave.
Master2 couldn't wrestle with Bear, or run with him in the park. But he displayed his affection for Bear by showering him with treats and toys. At first Bear had been concerned that Master2 didn't like him, as he ignored Bear and refused to play even when Bear politely offered him his ball. But eventually his attitude softened and Bear attributed his initial aloofness to the pain and fear he could smell on him at the time. Now the fear smell was mostly gone but the pain smell still lingered. Bear was careful never to jump on Master2 in greeting as he sometimes did with Master1.
They had been out for a walk to one of their usual locations (Bear had marked the tree they stood by so many times it was no longer necessary.) Master2 became sad as he watched the other people, particularly one female that often came by when they were there. As usual their walk would then take them to the park, where Master2 would release Bear to play while he waited on a bench.
But Bear was not about to leave Master2 alone and vulnerable to a sneak attack.
No squirrel was stealing Master2's doughnuts while Bear was there!