Billionaire Black: My Billionaire Boss, Part 4 (A BDSM Erotic Romance‪)‬

Brooding billionaire Jackson Stone wants Delilah to be his slave. To wear his collar. But she's afraid of what that will mean. Afraid of who she'll become...
After giving her a few days to decide, Mr. Stone invites her to be his date at an extravagant party but he has a plan to punish her for sneaking into his office without permission.
Will she finally give herself to Mr. Stone or will she let fear destroy everything?
Meanwhile, her past is catching up with her. Someone knows what happened all those years ago when Stone Pharma burned to the ground...
This is the fourth part of the "Billionaire Boss" series by Emily Cantore and is 10150 words long.
EXCERPT:
By the time I reached the top floor my entire body was humming with tension. I wanted Mr. Stone. I wanted him right now and I didn't care about the consequences. I dropped my bag on my desk and strolled over to the doors. I took a second to adjust my clothing and then pushed the doors I open.
I. Was. Going. To. F**k. His. Brains. Out.
Except the office was empty.
I was about to swear in disappointment when I saw something sitting on the desk that took my breath away.
It was the leather collar.
I approached his desk and the collar and had that squirmy crazy feeling rise up within me. I felt Iike I was back in his secret dungeon surrounded by sex toys. The doors closed behind me and I found myself standing in front of his desk looking at the collar, my heart pounding.
I picked it up and felt the supple leather warm almost instantly to my touch. This time my fingers were cooperating and I unclasped the collar before stopping and holding my breath. I wanted to put it on. I wanted to wear his collar. I wanted him to fuck me while I wore it. I wanted to be owned.
I reached down with one hand and pressed my fingers against my sex. I was so hot and wet and I couldn't help myself moan at the pressure.
I heard a soft click behind me and I nearly jumped out of my skin but there was no one there. I rushed over to the door and found it was locked.
"I gave you very specific instructions Ms. Neri."
His voice surrounded me. Hidden speakers. He was watching.
I whipped the collar behind my back, my face burning red, and heard him laugh.
"Stand in the middle of the room, little slave," he commanded.