How I Became His Office Fucktoy

"Good, so am I." He inserted his cock into my hole carefully and slowly. As he pushed in and then past my sphincter the puncturing feeling was so good I moaned in ecstasy, all my sensitive nerve endings were being touched, it was amazing. I haven't been fucked up the ass in a long time and I missed it! As he entered my anal cavity there was some pain as his cock was swelling so big it was stretching my cavity and rectum. I let out a small scream.
"You okay?" he asked.

"Yes, it's fine, don't stop," I pleaded.
He started thrusting slowly, but got faster and faster, deeper and deeper with each move. His legs were slapping against my ass and legs. Smack! Smack! Smack! He started screaming insulting, degrading names at me, "take it you bitch! You're my whore! My slut!" Smack! he slapped my ass so hard it stung, and I screamed as he fucked me, my ass was red and tinder for days afterward. In and out, in and out, he thrusted, his cock could barely fit, after a few minutes, with his sweat dripping on my back, I could feel his cock swell and throb, then it shook as it exploded and blew his cum, his semen, his DNA into me. He just seeded me! He CONQUERED me! "Yes, bitch!" he yelled in ecstasy. Meanwhile, my cock and balls have been rubbing against the top of his oak wood desk as he fucked me and now cum was spilled on it.

When his cock was done squirting he stood there, his dick still inside me, he was bent over my back, breathing heavily and quickly. "Thank you," he whispered into my left ear then sucked on it and kissed me.
This attorney kept not just lube, but also rags, bleach, soap, body spray, cologne, and mouthwash, as if he was expecting to have sex in his office long before this. And we used all of those to clean up with.
"Sorry i got carried away," he said.
"That's okay, I liked it."
"I want to see you again. Maybe this will even become a regular thing? You could be my Office Fucktoy."
I blushed.
"Better than a stress ball," he added. "Here," he took a $50 bill from his wallet. Being an attorney, he knew what to say, "this isn't for the sex. It's a tip or early Christmas present for all the hard work you do here."
We kissed again before I left.