"Don't lie to me," He warned Finn in a hiss - one hundred percent into his act now that he had seen (could feel) the way Finn was reacting to it. Yeah. Yeah they were doing this again. Though he might need to invest in some restraints a little more effective than a shirt... His nails found the softer flesh of Finn's nipple, and he gripped it and pulled, sharply, just to accentuate the words.

He raised his head, grabbing Finn's earlobe between his teeth. "Don't tempt me, Finn, or I will ruin you."

That last part was maybe less act than the rest.