"Hey, been a while." Bruce sits close to you. He's not afraid of what you might do. Joker's toxin in you or not; you are still his sibling. Even if you are locked up in your own room because you might do something you shouldn't. Bruce doesn't care. You're family. His family. "Sorry for not coming faster. Gotham is handful lately." Not to mention he was busy finding a cure for Joker's toxin in your blood.