I think you are thinking of this dialog. It doesn't specifically say that Wo was related to either of these two people. The dialog doesn't really end, it just sort of runs out...

"I knew a little girl once. It was a long time ago. Or so it seems now. It was a time of great fighting in my country. I tried to keep her from being afraid. Her mother and I. And I don't think she was. Or perhaps I just want to think so. Then one day during the fighting, she ran into the street and..."