It might, on someone who very distinctly wasn't Yvaine, be something close to panic. If it wasn't her. Because she doesn't panic.

Ever. At all.

"Tristran, they're your family," she says by way of explanation. "They're important. I am supposed to make a good impression."

Oh gods.

"Tristran," it's a bit more desperate this time. "I threw dirt at you - I don't make good impressions!"