Getting them to stop immediately isn't really in the stars here — but the fighting does have to end eventually. We'll offer you a roll to get some information out of Erinne: She's quick-witted and not prone to handing it out, but we did knock a point off for mentioning the violin music. She would be intrigued — actually, she might even seem quite surprised to hear about it.

Does a DC of 12 sound OK?