Norah might have thought it was strange Ciaran hadn't told his brother about Lachlan. She didn't really know much about Ciaran or his family, though. So it was probably for the best anyway. Norah was ignorant of the immortal world, and she probably would have had the same reaction as any other person: That they were all crazy and needed to be in an institution.
"I suppose we are. It'll teach us both." She paused before asking, "So you're from Germany? I didn't realize Ciaran's family came from there." Or maybe he just spoke German and had an impeccable accent.