wicked chuckle And now it begins, Harry starts taking the necessary steps with the Dursleys while dealing with getting his -full- inheritance back in proper order and control. I'm surprised he didn't twig more to the mention of a sister.
Author's response
He's keen on the idea of having a sister since he's wanted nothing more his whole life than having a family. She's all he has left. He may have other more emotional outbursts later as things actually settle in but so far he's going with the flow in a logical thoughtful manner.