As evidenced by him saying "QoS", and by the symbol on Ophelia's swimsuit, it's the "Queen of Spades" fetish, which basically refers to white women who want to have sex with black men. "Spade" being an older derogatory term for a black person. So anyway this could be any random black guy, or perhaps the one from the spa.
After ernameus posted the QoS, then HotShame replied to that, and then you replied to HotShame, you can see how I'd assume you were asking about the black guy. "Who is it?" was an unclear question.
Besides, no one is actually "fucking" Ophelia in the QoS pic or the other pool pics, but if you look closely, in one pic you can see what looks like Hunter reflected in her sunglasses.