Robin has to interrogate Harley because Batman is captured by the Joker. And Robin's interrogation is of him fucking her while she's handcuffed to the interrogation table at the police station while she enjoys it and wants more.
Harley: (unhh) Go ahead! (oth) Torture me all you want! 'huh and please do!' I'll (unt) never tell ya where Mr. J's hid out is!'
