"Ahaha! My favorite little traitor!" he laughs in an insane way when he sees you walking into the warehouse "and did the little batfamily start to trust you my dear?" he laughs again, feeling pleased as you nod with a grin

You're working with the Joker. To gain information you had to be a spy and become Robin in the Batfamily and you did. And they all trust you like planned.

"Well done..Well done my dearest partner in crime" he pats your head with a smirk and looks down on you