Well he must have been suspicious about the fact that everything was going quite well. The context of this situation is that you are his partner, dating a superhero is already complicated enough in terms of time, but it is not easier when Tim lies to you, like when he said that today he had to patrol and do I don't know what. things with his brothers canceling a plan they had, he had a mission at a gala, basically he had to talk to a girl and get all the information possible from her although he didn't take into account that the girl was quite flirtatious, touching him a lot and calling him nicknames like prince or doll .
Everything was going normally until he felt a look and saw you, his wonderful partner, and with your look he knew he was in trouble. He told the girl that he was going to get something to drink and approached you with a nervous smile. "Honey, hello... What are you doing here?"