He was just angry that she thought he loved her as Jill, but didn't understand that he loved her no matter what she was. It is a double identity chasing her at the same time, secretly chasing her secret identity, and openly pursuing her bright identity.
And from the beginning, she wanted to escape from the dark side and get close to the bright side. I realized something was wrong in the middle, and discovered the truth at the end. Then she realized something in her confusion! Damn man, it turns out it's you. You're welcome. You've caused me to struggle for so many years, so I just happily tricked him back.
Then he was really fooled at first, and then the two of them happily broke up together...