By reflecting on what he thinks Isobel’s family wanted for her, Mr. Mahmood contextualizes his sense of inadequacy in his marriage. At the same time, however, it’s necessary to note that he simply assumes that Isobel “probably” never imagined marrying someone like him and that her parents were disappointed—he doesn’t know any of this for sure. That being said, Mr. Mahmood’s status as an unreliable narrator becomes particularly evident here. After all, even though he’s so worried about whether Isobel imagined her life to turn out this way, she still agrees to go on a drive, takes the wheel because he’s drunk, and doesn’t force him to continue their earlier conversation. It’s quite possible that Isobel is happy to support her husband even despite their differences.