Final answer:
Juliet tells her father she has repented for her disobedience and is now willing to marry Paris in Act 4 of Romeo and Juliet.
Step-by-step explanation:
In Act 4 of Romeo and Juliet, upon Juliet's return from Friar Laurence's cell, she tells her father that she has repented for her sin of disobedience and is willing to marry Paris. This sudden change in attitude comes after the Friar devises a plan for Juliet to avoid the marriage by drinking a potion that will make her appear dead. Juliet's feigned willingness to marry Paris is part of a larger plan to escape with Romeo.