The word reward hit me harder than any of the spanks.

My aching, searching cunt clenched so violently I had to press my thighs together. A reward. From him. My mind flooded with images—his mouth, his fingers, his cock. I didn’t care that my ass was on fire. I didn’t care that tears were still drying on my cheeks. I wanted whatever he would give me. I wanted it so badly my hands were shaking as I picked up the pen.

I forced myself to focus.

Every word he had said earlier suddenly mattered. Elasticities. Demand curves. The exact definitions I had ignored while drawing him fucking my throat. I...