Answer:
To her, duty is more important than love
Explanation:
Lady Capulet relates Juliet's understanding to that of someone who still does not have requisite understanding due to her age. Her statement, that there is little more useless Than a boy means that indulging in a relationship is almost the last thing one should adore or get preoccupied with. Therefore, we can deduce that Lady Capulet gives significantly more credence to duty than love. Hence, she feels Juliet's who has given in to love is mistaken and ties Juliet's understanding to her lack of experience.
Situational irony results when things happen in precisely the way we didn't expect them to.
The issue of Phillip's vision causes some situational irony: the only time he literally sees Timothy clearly is when he fails to "see" him as the kind man he is instead of an untrustworthy black man, which he isn't. And then Phillip goes literally blind and only then learns to "see" Timothy correctly.
Another word for Jubilantly would be B. Gleeful
Good luck!