Dick not realising that Bruce and Selina were romantic until after Jason comes along. Like, Dick isn’t an idiot, I am aware but he was eight when he first landed in the middle of the Cat and Bat/Bruce and Selina dynamic. And everybody has those things you just believe as a kid and carry on believing though the alternative is probably so obvious, only for the delusion to get shattered in later life. Dick knows that Batman is friends with Catwoman and tries to help her out, which is probably why Batman sends Robin home after apprehending her after some mission because he doesn’t want Catwoman to be embarrassed by getting taken in by the Dynamic Duo or he wants to give her a stern talking to about her criminal ways. Poor Bruce comes in early in the morning on those nights, always tired and extra sore, always unwilling to talk about it.
It isn’t until Nightwing is helping Batman and the new Robin on some case about an inter-city burgulary ring and lo and behold Catwoman was running it. As usual, Batman sends Nightwing and Robin home. Robin is grumbling because they literally just started patrol and he’s not even tired and Nightwing goes “Batman is going to try talk Catwoman around, you probably won’t see him until the morning, little wing” and Jason just looks at Dick going “You know they’re fucking, right?”
And Dick just bluescreens. He thinks back to all those times he heard Bruce sneaking in of a night, clearly not alone and giggling and Dick thought it was down to Joker gas, only to be gently but firmly turned away by Alfred who said he had it under control. Or all the times Bruce showed up to breakfast with a host of new bruises and scratches. Or that one very memorable “dream” where he woke up, when downstaors for a glass of water only to see Catwoman at the fridge in one of Bruce’s shirts and end up eating cereal with her in the kitchen. Suddenly, everything Dick knew is a lie.
