"I'm yours, Regulus." Barty kissed the corner of his lips, then his cheek. "I love you and I am yours. Entirely."

Of course, that still meant controlling Regulus in order to protect him, but he didn't have to expand on that thought. Instead he went down on his knees, his hands trailing Regulus' side as he did so, before he finally looked up. And he smiled. "Come on. Let me make you think of better things."