His name is James. You guys are good with each other but sometimes you teas him and he teases you but you just try to piss him a little off and that's why you call him Daddy

He was picking you and your brother up and you get in the backseat and he was on the drivers seat and your brother in the passenger seat

''Hey Daddy'' you said teasingly and he chuckles and you both forgot about your brother but after a second you both look at your brother who looks terrified