In Case of Emergency, Marry Me
At 25, Maisie Fairbourne is focused on curating magical portraits and eating toast over her sink. Marriage? Please.
Except, she and George Weasley made an Unbreakable Vow at 15: if neither were married in ten years, they'd marry each other. George, to everyone's surprise, remembers. And shows up, annoyingly punctual, on the exact date with paperwork, smugness, and a Ministry representative.
Maisie can't back out.
They get married.