The lube was cold, even against Isaac's overheated skin. He tensed for a moment, as it slid down, between his cheeks, but immediately relaxed as Derek's fingers worked him open. Thankfully, even though Derek had never used him this way, he always kept himself clean, inside and out. He hadn't wanted to admit it was just in case anything like this ever came to be, but there was no good reason otherwise.
"Master," he whispered, starting to get lost at the even in and out of Derek's fingers. The man's voice was as soft and reassuring, as Isaac knew it would he hard and demanding, and the slave loved it either way.