She thinks about fantasies of perfection and wills them to come true. Winning the war, getting married, he not being ostracised by Wizarding society, and them both getting good jobs; enjoyable careers to pour their energy into. And having children, one day, and watching her parents play with them, and sending them off to Hogwarts on the train and waving goodbye, and welcoming them back on holidays. She plots out their whole future – a shining, wonderful vision – and she whispers it to them both in a low voice, and she knows that he is smiling sometimes despite himself.