Sure. Easy. Spadam has a change of heart and wants to make good with Robin. By EOS she's too much of a big shot to be approached, so Spandam tries getting closer to her friends. However, since they're all still in Elbaf, a dangerous territory for a gubernamental lapdog like himself, he goes for a different approach. That's when he learns that Luffy is Robin's paternal sister. Spandam travels to Luffy's native island for a lead, goes to ask about intel at the only inn, and is immediately smitten by how gorgeous the bartender is. Three months later, Spandam has officially moved to Foosha Village and asks Makino to marry him. The step-son of by-now-defunct Yonko Shanks approves the union.