Our friend from China is still visiting, and I wondered whether Zoe would talk with her at all about her adoption. Well, she did. Zoe was giving XiaoLi a tour of the artwork (drawn, of course, by Zoe and Maya) on the walls of the playroom (which is also the spare room where X is staying). X asked about one of the pictures of a woman, and Zoe explained that it was her birth mother. When X asked about the tears on her face, Zoe explained that her birth mother was sad that she couldn't keep her.
It's funny, because when Zoe first drew the picture, it wasn't her birth mother, it was a self-portrait! I think Zoe was just looking for an opening to talk about her birth mother with X.