Answer: Graham
Graham (Jude Law) is Iris' widowed brother. He often gets drunk on weekends and can't make it home, so Iris puts him up for the night. Since her holiday is planned at the last minute, Iris has not been able to get in touch with Graham to tell him she won't be home. He arrives at the door as usual, meets Amanda, and, after a brief explanation and short conversation, asks her if he can spend the night.