She was at that height of bliss when one becomes completely kind and good and does not believe in the possibility of evil, unhappiness, or sorrow.
She was annoyed because she feared it would lead to unhappiness.
Everyone experiences feelings of unhappiness and sadness occasionally.
If her answer had been no, he would have again put her in a position where she would be to blame for Jonathan's state of unhappiness.
This is still the root cause of all the unhappiness in the world today.