The Breaking Point
Lydia knew that if she tried to persuade him, he definitely wouldn't listen.
He might even react the same way he did a few days ago, accusing her of siding with the Lancaster family and getting angry enough to hit her.
In short, once Vance set his mind on something, no one could change it. He was stubborn and arrogant to the core.
But Lydia couldn't bear to see her children ruined. The best soluti