Harry, being his endlessly patient self, asks with a wry smile, “And who am I going to spontaneously marry for financial aid?”
He clearly intends for it to be a rhetorical question, for it to shoot down Louis’ ridiculous marriage idea. But Louis answers easily, “Me. You’ll marry me."
aka the not-so fake marriage AU in which Harry and Louis get married to keep Harry from dropping out of uni (and if they discover that they’re in love along the way, well, that’s neither here nor there).