I have two curiosities about this epilogue.
Just who is the father of Luna's green eyed daughters? If it's who I think it is, is Hermione aware of it?
Makes me wonder if the 'brainy birds are naughty' thing applied, Harry found out just how naughty two brainy birds like Luna and Hermione could be, and Luna's girls were an accidental result.
Author's response
Yes, and I am sure Hermione would have 'supervised' the process