Slavery: A series of erotic games (book 04)
Bill was going to use her to tip the restaurant staff but on a much larger scale than tipping Marcus.
Regina tried to resist, the same as every other slave who ever wore one. Every so often, I'd see her start to flush, an orgasm ready to explode, only to die on the vine, the devilish device not taking her over the edge. I received an alert. The Slave Trainer was dying.
"Sorry to tell you this, Bill, but the Slave Trainer is dying."
"Lisa, what have you got in your bag of tricks there?" Bill said.
"I have this, Master Bill," pulling another Trainer out of her satchel, "plus a charger to put the old one on to recharge."