I think her mother knew that when she knew about her adoption a long time ago but hid everything from her husband. She was imprisoned by her husband's mistress for 17 years. The mother didn't even know how her daughter lived when she was absent from her daughter's life and thought her husband treats the heroine nicely. She didn't know her daughter lived all her life being bullied.

She is angry because her mother didn't think about her daughter and told her about her brother with her true identity. The heroine was living in the dark for many years and her brother was living a good life since her mother thought about her and her son more and left her daughter living in an abusive environment .

It is a good comic and the characters are portrayed in a clear manner.

They are her sister and her ex