Iris: I know I was so mad and you and my dad for not telling me that you were The Flash, but when I found out about this, I didn't know what to do.
Barry: What? What's going on?
Iris: When Francine came back, my dad told me not to trust her, and he was right. I didn't know how much. When my mother left us, she was pregnant. She had a son. Joe's son, my brother.
Barry: What's his name?
Iris: Wally. Wally West.
