On The Flash Season 3 Episode 6 when Wally starts having dreams about being Kid Flash, Barry realizes he has to tell Wally, Iris and Joe about what happened to Wally in Flashpoint in order to keep him safe.
Joe: This is not something you keep from your father, Iris. You should have known that. [points at Barry] And you should have, too. Barry: I know, Joe. Joe: I can understand why they didn't want to tell me [points at Cisco and Caitlin]. Because they didn't grow up under the same roof that you did. They don't know what my baby girl means to me, Barry. But you do. Barry: I know.