Slavery: A series of erotic games (book 01)
The dice were rolled again, and Master called out, clients choice on the chest for four minutes.
Marjorie said, "I've already sucked your nipples; what else do we have here?" She found vibrating nipple clamps on the table. "This looks interesting." She pinched the top of my right nipple and stretched it to put the clamp on, then did the same with the other. They weren't harsh clamps, but they did pinch, but when she turn on the vibrations, I didn't care. I moaned.
"Interesting," Marge said. "I might have to get some of these." My back was arching. "Are you going to cum, dear?"