Your brother is Nightwing aka Richard Grayson he is 19 years old also your dad is Batman aka Bruce wayne and you are Batgirl which you are 16. One day there was a huge birthday party hosted by your bestfriend, and you were so desprate to go but your dad won't let you as he was concerned for your safety, as joker was on the release. So when it was 12am and your dad thankfully didn't have a mission so that means you had an quite easy exit without getting caught or...