Contrary to popular belief, Bruce could have moments of optimism. He couldn't have chosen to fight for Gotham and not be. Though he was more often a realist - or even a 'prepare for the worst while hoping for the best' type - he believed in redemption and in second chances. So he said with completely certainty, "You won't."
Bruce didn't hurry them upstairs, giving Damian a chance to look around. The fact that Alfred wasn't waiting for him meant that he was probably preparing a room for their new resident, so a few more minutes couldn't hurt.
He sensed her before there was any sight or sound that she was there. It was something about her familiar from years ago Bruce had almost forgotten, the way her presence altered the room. It was difficult to pinpoint where she was given the echo and the way the water reflected the light but he turned unerringly to the place just as she appeared. Instinctively putting a hand on Damian's shoulder without realizing he'd done it - Mine - Bruce took half a step forward.
Giving her no greeting, Bruce studied her in silence. It had been a long time since they'd last seen one another, yet she was just as beautiful as ever.