"I know you have to ask, and thats okay. Thats always okay or did you forget who you were talking to. Anything you need from me, its yours and that includes the blood."
Truth be told that was most of the reason for her pronouncement but it was nonetheless true. There was nothing she wouldn't do for him and she thought he was starting to understand that. Starting to see what it was like to have power like that. And she wanted him to see it, so despretely.
She held out her arm to him, he'd have to lean forward but he could drink quite comfortably from there and she could make sure he was happy, was content like he needed to be. She'd make everything okay for him. Everything.
"...Right there" she told him leaning in to softly kiss him before looking down to the wound and raising an eyebrow just slightly to indicate he should make the cut and drink. That she was ready for him to do so. It had to be him doing it. He needed to see her blood as his, in many ways he needed to see her as his. It all added up. It was all better for him in the long run, would make him stronger, and he'd love her all the more for it.