Why does Juliet feel her behavior is immodest?

Answer 1

Juliet is a young girl who is completely and intensely in love with Romeo. Because of her love for him, she trusts him with her whole self and her life. This is why she is so open and comfortable with him.

Answer 2

In the balcony scene, Juliet says "Thou knowest the mask of night is on my face, Else would a maiden blush bepaint my cheek for that which thou hast heard me speak tonight." Or in other words if Romeo could see her, and he can't because it is dark, he would see that she is blushing. Why? Because of what he heard her speak tonight. What did he hear that was so embarrassing? Oh, stuff like "be but sworn my love and I'll no longer be a Capulet." Why is this embarrassing? Juliet explains. "I should have been more strange, I must confess, but that thou heard'st, ere I was ware, my true love's passion". By 'strange' she means cool, aloof, denying any kind of interest in Romeo's love. By 'strange' she means the kind of behaviour Rosaline has been displaying. That's the kind of modest behaviour that was expected of girls, while the guys were expected to have to break down this artificial wall of indifference by swearing numerous oaths and protesting that the beloved is killing him with her cruelty. But Juliet has let the cat out of the bag, and the artificial game of love is no longer appropriate.

Answer 3

She was modest enough during the party when she could see him. However, later that night when she was on her balcony and thought nobody could hear her, she dropped all her pretence.

Answer 4

If you mean from Shakespear's play she wasn't. She died a bride.