Isaac whimpered slightly, at the thought of being branded. When he had first arrived, he had offered to take the brand, to be shot through with enough wolfsbane and electricity that it would take, even if it was faded. Derek had refused of course, not willing to put Isaac through the level of pain it would take.
"I am yours," Isaac replied, tipping his head back, to bare his throat further. It was something they both knew, and now they both seemed to accept, but it bore repeating.