If Amara was there with them, she would have ensured their parents don't force some marriage alliance on Amelia but now she was not there and was therefore worried about her sister, what if she is being led into something, she doesn't want to be in.
Amelia would not even rebel and accept her parents' decision, Amara was disturbed the more she thought about her sister.
There were many thoughts going on in her mind but she was helpless, she promised Michael she would cut off contact with her family and would never try to get in touch with them and they too never tried to reach out to her.
