Even though most of what Abby said hadn't been what Alastair had actually assumed was going on, as soon as she said it, it believe it. Marina must have said some horrible things to Will about him over the years. It just stood to reason. She had certainly said some terribly things to Alastair about himself. And of course Will would listen to Marina. Of course-
"I'm trying," Alastair said desperately. "I try every day to show him I love him. He just doesn't want to listen. I don't know what to do. There's no one else he can stay with. And I actually want him here. I was excited when I found out, but he won't have it."