Father is still like that. [Meaning that Ai has never actually met him other than to visit his tomb.
But she knows Zero's feelings about Kaname. Knows that even after all these years he'll never forgive her father. But that doesn't affect his feelings towards her or her mother.
A slight frown crosses her face at hearing that information. Well, of course her mother would be devastated to hear about her father's fate.]
She would have been more upset had you not told her. [If Yuuki had found out through memories by drinking Zero's blood it would have been worse.] Mother will get better.