I love watching their relationship grow: they love each other so much. I know they have years of bickering ahead of them - the hair pulling has already started (though only one of them has hair, and only one of them is pulling it). I'm sure there will be tears and shouting and jealousies in their future. But for right now, they are best friends and co-conspirators. They are a devoted to each other in a way only siblings can be.
So much love.