He stopped to watch Dinah scoot around, trying to get comfortable, and nearly commented before deciding that there was probably something in the marriage rules that prohibited him from pointing out that his wife was too fat to be doing what she was doing. They were perhaps not an ordinary couple when it came to watching what they said, but even Bruce knew there was a line. She'd need help back up, but she was settled for now, more or less. He'd just have to make sure she didn't sit too long.
"If you don't come back, I'm coming to look for you!" Bruce called after Dick and Tim, loud enough for them to hear as he switched from pencil to paint and began the base layer, careful to remain in the lines. Then, he started adding definition and some texture. What Bruce knew of art came of necessity, he'd needed the skill for sketching suspects, locations, and anything else of interest. He was no artist, but he did have a talent for observation, and an eye for detail.
Damian, on the other hand, had those things, and talent. Bruce had made a point of not commenting on his son's presence, afraid that if he made too much of it, Damian would get defensive, but he paid attention without looking around, and was rewarded by something he never thought he'd hear.
Bruce paused, and it took every bit of his effort to continue what he was doing and not turn to watch what might happen next.