Imperial Problem Child-verse. When Han and Leia get married, it's already going to be a royal wedding. Do they end up trying to balance Imperial, Naboo, and Rebel traditions with Alderaani and Corellian ones?
Knowing those two, they probably sneaked off with like a handful of their closest friends and eloped in a private ceremony on Naboo. Bonus irony points if the Naberrie family was like “oh you kids should use the lake house for the ceremony.”
They let everyone else know in a memo later. The secret service was pulling their hair out, the news was going crazy, and Vader was out sparring with Luke in the courtyard like “Honestly I don’t know what I was expecting, but apparently some things are genetic. Either that or my mother-in-law is very very sneaky.”