Any other ideas?

He couldn't help the curl of his lip and the narrowing of his eyes as she gave him the sarcastic retort instead of the honesty he asked for. His white tail flinched in annoyance as he hovered over her.

He firmly pressed just a little harder into her back, over a tender but sealed portion, as you wish. He thought. "Try again, Vesper." He hissed, "You can save the sass when I'm not trying to measure your health." His words ground through gritted teeth.

She had to learn to give him absolute honesty at least in this circumstance, he knew it hurt, and he wanted her to say it hurt. Kindness and compassion were a joke to her, let's see if he could learn how to communicate in a way she understood.