Demon attacks are rare.
Of course, a single traveler or a small group of them is so fantastically unsafe from such that no one in their right mind would do that in the first place, but large caravans are usually perfectly safe.
She nods.
"Well - I'm not urgent. Actually, might be a good idea to keep me here for a while, as - kind of a step in the right direction on the general problem." Thoughtful pause. "And, hey, if you know anybody else I can charm into recognizing my personhood..."
This time when he fucks her his cock swells just a little bit with each instroke, a change so subtle and gradual one might almost think one was imagining it.
He heals it. And then breaks it again. And then heals it again.
He gets fast enough with it to snap her leg in time with the inward thrust and heal it as he pulls outward.
Once her cunt is badly enough damaged by a combination of spines and size he heals it so his cock can start over on fucking it up.