Joseph was taking very little blood, a few drops with each bite. Just enough to give them the intense pleasure of feeding and being fed on. Even the open cuts his fangs left were little more than deep paper cuts. Designed to sting and dribble temptingly, not bleed openly. And he'd certainly be sure Rhys got enough blood afterwards that healing any marks would be simple.
He grinned into the third bite as Rhys writhed and arched underneath him. He sank his teeth deeper, taking a few more drops just to tease them both more. Then he released Rhys' arm, licking his lips pointedly as he looked at the younger Kindred with unbridled lust in his eyes. "Is there something you want, love?" he drawled wickedly.