“Lock the door and come over here.”

I pushed the lock and came back. His cock sprang out. My mouth watered, producing the extra saliva I needed to slide this monster further. He grabbed my head and pushed his cock deeper into my mouth. I gagged, but he didn’t leave.

“Fuck!” he groaned.

I felt hot cum shoot into my mouth, sliding down my throat. I pulled his almost softening cock out of my mouth, wiped my lips with the back of my hand, and gazed at him.

“You help me, and I’ll help you with your grades,” my professor said.