Dinah bit back a laugh at the look of realization on Fred's face. She was at least glad that Fred hadn't said anything about comic books. Mainly because she wasn't sure if Bruce knew about those and she didn't want to be the one to have to tell him about that. Finding out that you were considered fictional in some worlds wasn't exactly a pleasant surprise.
She caught Fred's eye and managed a subtle nod, as if to confirm that he was who she thought he was. She didn't think that Bruce exactly kept being the Hulk a secret, but she also didn't know if he was overly comfortable discussing it either. So better to keep the conversation away from the big green elephant in the room, so to speak.
Dinah took a seat and and a couple of tacos for herself, along with some of the guacamole and chips that they'd picked up to go with. She smiled a little as the two science-types already started discussing the details of working together.