Regina knew it was a sign of submission, and if she'd been thinking about it, she might have made the gesture intentionally in invitation. As it was, it had been instinctual, at once focusing on her mate and her pleasure and offering herself to him for his. Whatever she'd intended and whatever he'd made of it, deeper and harder was what she needed to come again, this time with him, and her cry of his name mingled with his growl of hers as she finished.