"Fuck, Isaac," Derek breathed. His arousal throbbed, spurred on by his slave's, the scent rich, heady. His free hand slid down the curve of Isaac's backside, feeling the blunt end of the plug, working it slowly, testing his slickness, his readiness. "You sure you can take it?" he murmured. He'd never tried with another person. He'd been too innocent of the idea with Paige, and it was something he'd felt was too intimate for the anonymous slaves he'd taken his pleasure with. His solo experimentation had taken him as far as knotting his own fist, but knotting another person...that was new.