I've been a bad girl daddy
Expression used mostly by the younger generation from 18-20s to show their devotion to god, the sentence is a synonym for "Forgive me father for I have sin". Even though this is a relatively new phrase it has already found its way into lots of people; often in bed, praying to "daddy".
"I've been a bad girl daddy, I think I deserve punishment". This is an even bigger step, acknowledging their imperfections and accepting the conseuences of their actions.