Slavery: A series of erotic games (book 04)
"And that was just once. Imagine thirty or more of those. If you knew you'd be punished like that, would you want to be pleasing to your Master?"
"God, yes."
"Let's see if you are. I'm going to tie you to the bed."
Becky was rubbing her ass, but she reluctantly got on the bed and allowed us to tie her down, face up, spread eagled. There was a little fear in her eyes. Good, there should be.
"Now, I'm going to blindfold you," I said. "If you need to, say kumquat and everything will stop. Do you understand?"