[She understood instantly. Zatanna...had never been one of the Turtle parents, herself, but she had known others who were. Saw the bond between those who shared such responsibilities. And memories. And that fateful day had hurt her heart almost as much as those who'd suffered a great, personal loss.]

Probably because...it's not exactly the most pleasant memory.

A lot of us knew those little guys since before they hatched. Seeing what Malicant did to them... [She actually visibly shuddered.] ...I can get why not many would want to talk about it.