Harley instantly realised this was a big, BIG mistake.

The Joker froze. He went rigid.
His head was slightly tilted, he simply stared at her.

Harley felt fear rising in her gullet. She should have been more subtle, god the way he was looking at her, it made her blood run cold.

"Um, Mr. Joker?" Harley carefully asked.

"HOW DARE YOU."
His voice was full of hatred, his facial expression was one of rage, he began wildly thrashing against his bindings.

" Mister J, calm down!" Harley half shouted in worry and fear. Oh god, his right ankle was free of the restraint.

Harley felt her back press against the far end of her chair. She looked around her desk, where the hell was that panic button?

He was still yelling, his left leg was almost out of the ankle restraint.
"YOU LITTLE SLUT"

This caused Harley to freeze in shock, did he just call her a slut?
This angered Harley, she hadn't felt that angry since her mother sold all her stuff in a garage sale without asking her.

Harley stood up and screamed like she had never done before
"You will NEVER call me that again, I am NOT A SLUT!"
Woah, she was screaming at the most dangerous madman in Gotham city. She felt slightly...proud?

The Joker had stopped struggling and was simply staring at her again, a mixture of pity and confusion laced in his eyes.
Harley sat down, trembling.
"I'm really sorry Mr. Joker, that was inappropriate and I apologise for shouting at you." Her voice trembled, on the verge of tears.

Joker sighed "Y'know, I'm sorry too. It's just... a little bit of a touchy subject, sorry toots."

Before Harley could talk he smiling at her again, from ear to ear.
"So sweetheart, how was your weekend?"

Mood swings vary from extreme ends of the scale, multiple personality? Harley noted on her pad, she was slightly surprised at the change in his demeanour but she had read of the different ways he acted, most likely for attention.

Harley might as well answer him "It was good thank you, I caught up on a lot of work. How about yours?"
Joker chuckled "Pretty much the same angel."

He caught up in work too? Hmm...

The Joker stretched, well tried to before continuing

"He's crazy, you know."

Harley was surprised "Who? Batman?"

Joker rolled his eyes

"No, Santa Claus. Of course Batman. Always Batman. I've seen it in his eyes. Screaming mad stalkers and dishonest, hiding his face behind a fright mask. Well, no masks for me. I have nothing to hide. I laugh at the cruel absurdity of the world. But Batman... Batman, he's got them all fooled. He's made them think he can make a difference. That he can actually make things better. And the Joke of it is, they all believe it!"

"The police?" Harley had her confused face on.

Jokers voice got louder.
"The police, the media, the frickin' junior rangers, every last sack of walking meat in this urban cesspool. Listen, sweets, Batman knows we're all on the same funhouse slide into madness, why won't he admit it? He's up there in his belfry laughing at us. And the real gag is, the miserable liar is allowed to run free while I'm in here."

Harls chewed this through in her mind "That's really incisive."

His eyes lit up "Then you understand, don't you? You know why I do what I have to do. You know Gotham's only real saviour... is me."

This left her head spinning well after the session ended.

As Joker was led away from another session, Harley wrote up every note she had made during the time they spent together. Slowly but surely she felt she was piecing him together, his dark and twisted soul needed saving and no one had realised.

Apart from her.