Charlie understood Kathleen’s concern. His identity would certainly be the Acker family’s focus, especially after today’s crisis and contact.
With the Acker family’s strength, it was only a matter of time before they learned about his identity. They simply had to follow the clues to investigate and start with either Quinn or Kathleen.
The Acker family would definitely figure out who he was through their investigations, so Charlie must intimidate them from looking into him. His goal wasn’t to d