[While Caliborn was very much just messing around before, that legitimately pisses him off. It's a 180 degree turn in his temperament, going from regular nasty to actually angry nasty.]
Don't you fucking dare. Especially not. In front of this-
[Caliborn pauses and surveys Piper. He doesn't want to use up all his good words on someone who could make things explode, if she really was to blame for that.]
Hey. Intervention bitch. Tell her. Not to say my sister's name. Do it.