Mo Lihua was already an exile, but she was still considered an ultimate tool that could be used in the future for the benefit of the family.
That was because the status of freedom did not exist in their family unless death had given it. That was also the reason why Marco finds it really strange that the old patriarch allowed her to be bought. Before, he did not think much about it because he was too busy building his own support within the family.
That was the case, even when he learned that his father was still silently looking for Mo Lihua's mother, or how the patriarch was giving a noticeable special treatment to Nikos.
Then suddenly, they all learned that she would be part of the Selection. Not to mention, the inheritance that was supposed to be for them?