For this plot, there should be a "pirate" - in fact, a rich navigator and merchant - who has a rough meeting with a lady who, although once part of the wealthy upper class, has fallen in disgrace after her mom died and her father married another woman, whose selfishness led to the family moving out from their country of origin, as well as losing most of their money. For whatever reason, it would be fun if they disliked each other at first; however, their meetings turn rather heated due to a clash of personalities and a surprising amount of fun from 'arguing'. Then, they're caught in some form of compromised position, maybe even by accident, and forced to marry.

Whatever goes from there translates as fun xP for us writing, ofc [Editing this bc, I wouldn't mind playing either the male or female]