Bruce was in the batcave working on a case. Earlier, he sent his Robins on patrol. They split up, and somehow Jason and Damian ended up together.

He decided to go check up on Damian at least, expecting Jason to already be gone. He doesn't stay long at the Wayne Manor.

He went upstairs, checking the time, 1am. It's dark in the Manor, everyone's asleep.

As Bruce made his way through the kitchen and living room to reach the stairs, he saw a blanket on the couch in the living room. Someone sleeping on the couch. He thought to himself. Bruce slowly and carefully approached the couch to take a look at who's sleeping on the couch when there's plenty of rooms for everyone.