You called me a sweet, summer child. That's what people call those of us who were born in the Long Summer, those of us who haven't seen a winter. I only saw my first winter over the past few years.

( Sansa is still confused but a little less startled than before. Why would he know that expression if he isn't Westerosi? It makes no sense - and none of his speech or manner up until now makes her think he is Westerosi. )

It's a common saying where I come from. The words of my house are Winter is Coming. House Stark is always preparing for winter.