He's surprised at the apology. He didn't think her the sort to say sorry so freely. He doesn't even really know what she's apologizing for. It certainly wasn't her fault Susan was upset. His brother would have felt that way whether Annabelle were here or not.

"It's not your fault." he looks to her, his expression earnest. He wants her to believe him. "He's never been good at dealing with things like this."