No offense towards the guy, but, is there an option to break up with Tristan if you like Darius more?
Viewing post in A Little Inconvenience comments
Break-up via murder.
On a more serious note, I may consider a break-up option but given the game's tone + Darius' motive, simply breaking up with Tristan would remove any level of danger or threat Darius has. So if I were to implement a choice, I'll need to make sure it doesn't change the story too much and will still give Darius a reason to kill him.