Anguish
Arna realized it was going to her nightmare which will haunt her for many years. She wanted to laugh at herself for expecting a blissful life filled with happiness and love.
Returning or not returning, what she has in life was retribution for her mistakes. She hoped only she should have the punishments for her sins but not her family or others.
Ivan took a step next to her but Isaac held his arm. Isaac hated it but he still shook his head stopping Ivan from protecting Arna.
If Ivan protects Arna, Isaac knew Eva would never calm down, and accepting Arna as their son's bride would become a dream.
Arna needs to face Eva for their smooth future and to cool down Eva's frustration which was piled up for nine years. Despite knowing it was going to be hard on Arna, Isaac chose what was best in the long term.