Deciding he didn't like her tone, Cas kissed her again roughly and forced his thigh in between her legs without thinking about it. Anything to shut her up. He felt he liked her better when she couldn't speak, and though there was no comfort in that thought, he left it alone.
He couldn't help moving slow - he didn't know what to do, and the fact that she wasn't guiding him in this was as frustrating as it was infuriating. He supposed he should have expected that.
The urge to taste more of her was strong, so he went with it, following her advice, lips and teeth rough against her skin as he released her mouth and attacked her throat, hoping she'd say nothing of the matter.