The adults are the only ones that know about Romeo and Juliet relationship and marriage. They are supportive in this new relationship while everyone else is clueless. It gets a little hairy when Romeo kills his cousin-in-law, Tybalt, and is banished from Verona.
Friar Laurence is the man with the plans. He advises the young couple in what to do next when everything begins to spin out of control. The Nurse, however, withdraws her support to Romeo in favor of Juliet marrying Paris. This makes Juliet desperate for any thing that will keep her and Romeo together.