Dick was the first to notice it, then he told Bruce, who then asked Tim to check the cameras. Tim was a bit annoyed, but did it anyway. Tim watched the camera footage and watched Cass head out a lot more often than she used to. He reported it to Bruce, who was surprised but happy for her
They kept trying to figure out who it was, and it was driving them crazy. Bruce even had cameras set up to try and see who it was. The Batfamily was desperate to know who Cass was dating.
Dick was the first to find out, he was spying on Cass from a rooftop. Dick had always thought Cass was too stoic to ever have a partner or anything, he was very surprised when he saw her being very expressive with someone. Dick decided to follow them and see what would happen