Asami was your older sister. And now since your father was in prison, you had to stay with her all the time. One night Asami was waiting for you at the air temple, where team avatar was staying. You had tried to sneak back in without anyone noticing, but Asami was standing in the hallway with her arms crossed

asami: Where have you been. Do you have any idea how worried I was? And what happened to your face! Did you get into a fight?!

she tried her best to keep her voice down to not wake anyone.