KinnPorsche (Novel) Vol. 4 by Daemi (Author)

Pete has been missing for two weeks, and Kinn, Porsche, and the rest of the Major Clan are left to assume the worst--if Pete's mission spying on the Minor Clan has gone south, he's as good as dead. The Minor Clan never take prisoners, and their cruel oldest son Vegas is especially ruthless.
Little do they know Pete is still alive, chained up at Vegas's mercy. He doesn't feel like he's been spared a worse fate, though: He'd take death over being forced to warm Vegas's bed. Or at least, that's how he feels at first. As he comes to understand Vegas better, and catches glimpses of his captor's softer side, Pete finds himself contending with unexpected feelings. But it's impossible for him to forgive a man who keeps him imprisoned and viciously abuses him...right?