( The web seems to be forming and Sansa wonders whether or not her comfort has anything to do with it stabilizing. Perhaps it does, because Ser Jaime feels calmer, or perhaps he's just able to better visualize it now. )

Your brother trusts you. I trust your brother implicitly. It's not much of a leap to trust you. If you've ridden North for us, you're taking a great risk. That's not something you do without being honest.