Mr. Stark's Whore (слэш)

"So, do you want to have a little chat first, or do you want to go straight to the business at hand?" Loki raised his eyebrows and took another sip of the remnants of his coffee.
"I..." Tony hesitated.
"Mr. Stark," Loki smirked. "Have you never hired a whore before?"
"I... I think the word whore is a bit offensive, isn't it?"
"Not when I use it for myself. Besides, that's what I am. But if it makes you uncomfortable, I can call myself... A hooker? A prostitute? A social worker?"
"Uhm," Tony observed.
(In other words, Loki's a prostitute and Tony wants to fuck. Loki expects to never hear from Mr. Stark again, but then he starts to get hired by him pretty often. And Tony quickly becomes Loki's favorite client. It's nice and perfectly uncomplicated, until Tony learns a few things from Loki's past...)