Slavery: A series of erotic games (book 04)
"He is a good lover, Master, and your slaves would probably enjoy it, but you should choose their partner. There will be two male slaves here. Our three fathers, Master's poker group. Two of them are twins with the thickest cocks I've ever seen, a handsome black man, a nice Chinese American, and at least two other men, though one of them is essentially impotent. Master and our fathers, with the relationship to Brianna and Lucia, are likely to be frequent visitors. This may be a problem for you if you don't want to have any or much future contact with anyone chosen for such an honor as sex with your slaves. Choosing from men other than Master makes it more likely you wouldn't see them again.