Slavery: A series of erotic games (book 01)
I looked at my three slaves, appearing well satisfied and relaxed.
"Would you please tell me what the hell you two were doing by going ass to mouth?" I asked.
"Lisa and I thoroughly cleansed our bottoms this afternoon after lunch, Master," my slave said. "She said it would be possible to suck cock after ass fucking if we did."
"Cleansed how?" I demanded.
"Multiple enemas, sir," Lisa said, "until the water ran clear."
"Lisa said we can't do it all the time, but if you know your ass will be fucked, it's both less messy and possible to suck the prick afterward, sir," Julia said.