Stiles was a gift. There was no other way to describe the pleasure that Derek received at the boy's eagerness to please, and his fearlessness with which he went after whatever task he'd been given. The wolf watched with rapt attention, his jeans becoming constricting, as the boy licked and sucked, cheeks hollowing, skin flushed with desire and want.
When the boy finally pulled back from the cock, Derek let out a low, shuddering breath.
"...good boy," he murmured again, his voice rough with desire. "Are you ready to take it deeper? You'll have the urge to gag."