He couldn't hear the doorbell ring from out here with the meat sizzling away and Robb and Sansa talking and splashing about in the pool. He did, however, hear Arya calling for him, so he left the grill in Bran's capable hands as he went over to the front door. Tony Stark? It was not someone he was expecting to see at his house.
How could she know that if the door was closed?
He opened the front door half-expecting to not actually see Tony Stark, but there he was, standing there next to his assistant.
"Mr. Stark? Ms. Potts. Hello. Uh, please come in."