In Act 3, Scene III and IV of Romeo and Juliet, the nurse goes to see Friar Laurence and Romeo because she is concerned about Juliet's well-being.
After Juliet finds out that Romeo has killed Tybalt and has been sentenced to exile, she starts to feel bad because she is convinced that they will not have their wedding night. She feels sadder for Romeo's banishment than for Tybalt's death. In that way, the nurse goes to visit Friar Laurence and Romeo to make sure that Romeo and Juliet have their wedding night, but mainly to make Juliet feel better.
