Ren was enjoying this game, and looked forward to playing through it even more. He noted her, watching her, grinning as he did so and shrugged, "I understand, I understand very well what you're saying... but no. I don't think I will," He began to push against her magic with his own. Not using the full ferocity of his anger, but instead simply letting it play out. Seeing how she'd react to him sort of fighting back against it.
He wanted to give in, sort of, but he also wanted to fight, to force her to have that fight in her, to take and force more control out of them both. He watched her with fierce eyes, waiting to see how she'd react.