This should be around the time that no one knows that Romeo and Juliet are married.
Romeo basically starts the fight between Tybalt and Mercutio. They both later die, and Romeo is banished.
Juliet is asking the nurse for help, but doesn’t want anyone to know she is married. So she pretends to actually want to be with Paris. She later goes to confession with Friar Lawrence. She doesn’t know that Romeo has been banished yet.