Holding your baby sisters hand on an hour long trip even when she's fallen asleep!
My girls seriously love each other. The little one giggles and squeals with sheer delight when she sees her big sister and in return her big sister is fiercely protective and so full of love.
I'm sure they'll have their moments but, right now, I want that vision ingrained into my memory for any bad days to come.
My girls. My happiness. My life.