"Sod off" Means "I Love You"
This story was such a delight to read: Millicent and Dennis, basically two names JKR dropped and never fleshed out, are made beautifully real. I admire how perfectly you've paced the story so that each scene has a purpose in revealing some bit of information necessary for the next scene. And the details you reveal about each character made me love them--Millicent's barbed speech, Dennis's need to please. Cap it off with such a hopeful ending and I'll be waiting for reveals quite eagerly to find out who wrote this bit of gorgeous storytelling.