I'm Coming to Town - Let's Hook Up

It doesn't take long to get regulars. I lost my first set of regulars when I switched companies, but I have a new set already. Sometimes they get very attached.
Recent call situation: “Hey, I’m coming to town and figured we could hook up.” I respond with, “yeah, maybe.”. You see, I don’t want him to stop calling because he drops big money on me a couple of times a week. The hope is that he just wants to do a phone fantasy about us meeting up in a hotel. Something with me showing up in a red plaid school girl skirt and a white button up top that is tied tight just below my breast. But I know that he is really wanting to hook up and marry me or something.
He responds with, "Hell yeah. Let me get your address. I'll be there this weekend."
This is where I start to break character. "Uh, I'm uh busy this weekend. I'm sorry... baby."
"Ok, then I'll come next weekend. I got to see you and be with you. Don't you think we have something special?" He responds.
Anyway, I try to wiggle my way out of this, but it doesn't go well when I finally have to tell him that there is no chance of us ever meeting in real life.
"YOU FUCKING BITCH!! YOU ARE SO FUCKING LUCKY I CAN'T FIND YOU. YOU FUCKING WHORE!!!! I'LL KILL YOU YOU YOU FUCKING WHORE!!!"
Now, it becomes clear why he doesn't have a real girlfriend and has to call me twice a week.
The reallly fucked up part is he called back later and apologized.