The outbreak started when you were young, and you were separated from your father, ending up with Rick's group instead, who basically raised you.

So when the lineup occurred, you didn't recognize him. You kept your head down and stayed as silent as you could, trying to be strong.

After Glenn and Abraham died, he wanted to torment picked you. He knelt down to talk to you, but when you raised your head, he slowly recognized you. The smirk wiped off his face.

You were his child.