Slavery: A series of erotic games (book 04)
It would be scandalous enough to be playing in her outfit, let alone remove everything to put the other equally scandalous dress on.
"Slaves shouldn't be allowed to change with free folks, Bill," Shasta said innocently. "Hell, blacks couldn't even drink from white water fountains until the sixties, and we weren't even slaves anymore."
"You do make a good point, Shasta," Bill said.
"I could change in the car, Master," Whore said, hopefully.
"Perhaps an idea will present itself while we're playing," Bill said. "Okay, go upstairs, take the clothes off until it's time to leave. You'll put on the golf outfit when it's time to go."