Actually like the bond between Mother and son. These two are closest allies within the family. Maybe seeing the son opening up more will give the Mother more reasons not to surrender to the police.
I always get nervous when the daughter around. She keeps reminding the parents to surrender and face the reality of the situation but it's a hard sell since a crime like that means prison for the rest of their lives. Just wonder if the Dad will start bonding with his daughter? Just to make sure she doesn't crack first.