[It isn't exactly the direction she wanted this conversation to go but she supposes it was coming one way or another. Ai sighs and looks at the book in front of her. Might as well be honest.]
My mother. I'll look after her.
[Typically that's not the way things go, not for a long time (even longer for purebloods). But this is how it is at the moment.]
I would appreciate it if you didn't say anything to her about having a daughter, Kiryuu-san. She's not quite ready for that information. As far as she knows we're related and that's enough for now.