" Let me be your big brother, Harry had told Catherine at their last meeting in Hampshire, making it clear that he wanted to attempt the kind of familial relationship they had never been capable of before. With no small amount of unease. Catherine reflected that she was about to test his claim far sooner than either of them could have expected. And they were still practically strangers.
But Harry had altered greatly during the short time of his marriage to Poppy. He was far kinder and warmer now, and certainly willing to think of Catherine as something more than an inconvenient half sister who didn't belong anywhere. "

― Lisa Kleypas , Married by Morning (The Hathaways, #4)