Change her memories

"Zatanna I have an appropriate reward for my would-be assassin" you smirk evilly, causing Talia's face to contort with rage "first though make her believe everything I say"

"Of course master" replied Zatanna, curtsying in a seductive manner, with a sway of her ass, placing a hand on Talia's head she chanted "eveileb yrere drow retsam syas"

Talia lurched her head back, trying to resist but was ultimately could not stop Zatanna's Magic.

"Now Talia listen to me, do you remember what happened several years ago?" you ask, causing her to growl in anger "remember when you were sent to kill me before"

"What of it?" she demanded, rembering a false meeting. You smirked, things were progressing well.

"You couldn't bring yourself to kill me though could you? Not when you saw what I had done to Zatanna" you lied, but she couldn't help but believe you.

"I-I" she stammered unable to recall nor invent a reason for such an idea.

"You saw that I had turned her into my ****, a concubine for my own pleasure. And you became enfixed by it" you bullshitted.

Talia looked blankly at you, still as you were just repeating stuff she already knew. Or at least what she thought she knew "In that moment you realised how much you wished to be my ****. To serve me sexually, to have no purpose but to make me happy"

"Yess" she cooed, the false memories taking hold. Her eyes closed as she blissfully remembered that ‘happy’ memory, a small smile on her face.

"But you couldn't submit could you? You knew I would be in danger if I had taken someone so important from the league. And you only wanted to make me happy, but now that the league is all but destroyed your free to be my **** at my pleasure"

"Free" she moaned.

"Remember you came to beg to be my ****. Now you will forget that I just told you this but remember the truth I told you- now" you said snapping your fingers.

"Ezeerfnu" chanted Zatanna catching your drift.

Talia's eyes fluttered and then awoke "please sir, i need to do something for you"

She started to pull down her zipper as strolled up to you with her hips swaying in a seductive manner, revealing herself in all her naked glory "please I need to be your **** master"

"I'll do anything I can to serve you sir. I'll cook, clean or fuck you as long as you allow me to serve you" she begged, desperately kneeling at your feet.

Something about a woman way out of your league begging to be have sex with you was enough to drive you over the wall in anticipation.