Re: Issue of Robin explained this
Yeah, I know that. But we the readers know it was just a ret-con to explain how little Bruce (aka DC) regarded Steph. The depth of his sense of betrayal, hurt and anger of what Leslie Thompkins seems to have done (let a girl die on purpose just to prove a point to him) belie the ret-con that he knew all the time.
I was just wondering if Steph knew he knew and if not, if she wondered if there ever was a memorial for her like there was for Jason (who still has his even though he's alive again).