Rockstar says you won’t have to care about Jason and Lucia’s romance in GTA 6 if you don’t want to.
Rob Nelson explained that their relationship is important to the story, but players won’t be forced to engage with the romantic side of it.
“Don’t bother with it if you aren’t. Up to you.”
"The narrative is structured in such a way that the circumstances they find themselves in require them to stay together for most of the story and work together. At the very least they will get through most things as partners in crime,"