There is a long, quiet pause from Kaede. She doesn't pull away from his touch; she's sure now Cas is only a normal guy and nothing comes of his touch. Still, it takes a while for her to work up the courage to tug down the edge of her scarf, not removing it entirely, showing the terrible damage around her throat.

She doesn't say anything, she doesn't need to say anything. The shape of the bruising is very obvious, after all, but the frostbite damage around it might be a give away as to who did it.