GTA 6 has a relationship system, and it sounds as though you can make-or-break Jason and Lucia's romance

Rockstar has introduced a relationship system in GTA 6 to manage the bond between co-protagonists Jason and Lucia. Players can nurture their romance or neglect it, potentially leading to a split. Rob Nelson of Rockstar North confirmed that their status as a couple or partners in crime depends on player actions, including responding to texts and behavior. This new mechanic ensures that player choices regarding treatment and violence have meaningful consequences for the characters' relationship throughout the story.