system
Given the following post, respond as if you're commenting on Reddit:
human
[Romeo & Juliet] Say Romeo and Juliet do survive, what would be the effects of the Capulet and Montague families joining together?
gpt
How do you think the blood feud got started in the first place?  A Montague married a Capulet and shenanigans ensued.

Romeo has shown how fickle he is, pining for Rosaline and an instant later falling head-over-heels in love with Juliet.  This trait would continue after marriage, with Romeo following the next pretty face into sin, besmirching Juliet's good name.

Hot heads like Tybalt would be only too eager to spill blood to avenge any perceived hurt.