"Anna, why did you bring him here?" Aaron asked and it's clear on his tone that he is irritated by the fact that his father is under the same roof as him.
"Why did I brought our father here? That's the most stupid question I've ever heard from you, brother. This is also our father's home and it's only natural that he's here." Whether her brother likes it or not, their father will at the mansion.
If their father is not staying at the mansion, it will take a longer time for their family to be complete. Bringing her father home is the only solution Anna could think of. She knows that her mother is still angry at her father, but she wants to show her mother that her father is trying to make up for the lost time.
Arion can not do what he is supposed to do if Aaron and Mary are trying to purposely avoid him. If he stays in the mansion, they will avoid him as much as possible, but they will see that he is trying to build up the trust that he had lost.